The Power of Habit
by Charles Duhigg

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Habits, Human Behavior, and Success Theme Analysis

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In The Power of Habit, journalist Charles Duhigg explores how people’s habits—their automatic patterns of behavior—shape their lives, accomplishments, and identities. By making ordinary decisions automatic, habits save people time and energy. But, for this very reason, they’re also easy to overlook. Every day, people make hundreds of habitual decisions about ordinary issues like what to eat, how to get to work, what to do during their free time, and how to handle stress. While some people thrive by building positive habits like meditation, exercise, and willpower, others get addicted to more destructive habits like smoking, gambling, and overeating. Regardless, habits set the tone for everyone’s daily life. And because habits tend to reinforce themselves over time, they also transform the people who practice them. Thus, by bringing the latest scientific research on habits together with case studies from business, sports, and social movements, Duhigg shows that people’s success and failure depends more on their habits than their abilities, motivation, or conscious decisions.

Duhigg illustrates the difference between habits and normal decisions by examining how they work in the human brain. Neuroscientists know that complex thought depends on the cerebral cortex—the wrinkly layer on the brain’s surface—while habits depend on more primitive structures like the basal ganglia, which are located deep inside the brain. MIT studies have shown that, as people and animals learn certain behaviors, their cortex stops working so hard and their basal ganglia take over. In other words, once they’ve worked out a pattern, they use the basal ganglia to automate it. Therefore, while habits might start out as conscious decisions, they become unconscious behaviors over time. The famous brain injury patient Eugene Pauly clearly illustrates the difference between conscious decisions and unconscious habits. After a brain infection, Pauly lost the ability to form and retain new memories. But his basal ganglia were still intact, so he could still perform habits. For instance, he couldn’t say which house on the block was his, but he managed to take a walk around the neighborhood every morning and find his way home. Pauly’s experience shows how habits and decisions rely on two completely different circuits in the brain.

Furthermore, by automating routine activities, habits allow the human brain to use energy more efficiently and perform more complex tasks. When the brain notices a pattern, it forms a habit loop: it looks for cue, then performs a predetermined routine, and then finally enjoys (or gives itself) a reward. For instance, a feeling of boredom (cue) might lead someone to smoke (routine), which leaves them feeling relaxed (reward). While the brain perks up during the cue and reward, it gets to power down during the routine, freeing up space to focus on other activities. Just like a computer can run many programs at once, the human brain can perform many tasks at the same time because of this habit loop—despite its limited capacity for attention. This is why habits are so useful and powerful.

In fact, Duhigg argues that habits are so important that they tend to determine people’s most important life outcomes: who they become, what they choose to do with their lives, and whether they’re able to achieve their goals. This is first and foremost because most of people’s actions are based on habits, whether they realize it or not. If this weren’t the case, people would get bogged down deciding what to eat, figuring out what emotions they feel, and remembering how to do their jobs. Instead, habits automate all of these processes—and countless others, which make up the bulk of everyday decisions. This is why the famous psychologist William James argued that life is nothing more than “a mass of habits.” The idea here is that the kind and quality of people’s habits determines how effective those people are. For instance, two people might learn to cope with fear in very different ways—one might learn to face, overcome, and learn from their fears, while the other learns to run away from them. Over time, the person who learns from their fears is likely to achieve their goals more than the one who doesn’t. This is why Duhigg believes that developing good habits is the best way for people to become who they truly want to be.

Duhigg even sees habits as the root of many highly accomplished people’s success. For instance, he notes that habits are the cornerstone of U.S. military training, and he points out how Starbucks makes its employees more mature and responsible by teaching them to make willpower an unconscious habit. Similarly, Duhigg argues that organizations are also effective because of the habits they teach their members— for instance, Starbucks provides excellent customer service because it teaches its employees to develop willpower. On an even larger scale, effective corporate structures build norms and routines that balance power (or create “truces”) among rival executives. Meanwhile, poor habits can lead to catastrophic failure. Individuals can develop harmful addictions like alcoholism or compulsive gambling, while organizations can fall into dysfunctional patterns—like the Rhode Island Hospital, which repeatedly killed patients during botched surgeries because doctors ignored nurses who pointed out their errors. These examples again show why the stakes of developing good habits are so high: they can mean the difference between life and death.

Ultimately, Duhigg concludes that habits are a uniquely powerful tool. Controlling one’s habits, he suggests, is the key to living well. When used correctly, habits make people more efficient and effective. But when they go awry, habits can ruin lives and make people think (incorrectly) that they have no power to improve. Either way, the first step to developing strong habits is understanding them in the first place—which is why Duhigg wrote The Power of Habit.

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Habits, Human Behavior, and Success Quotes in The Power of Habit

Below you will find the important quotes in The Power of Habit related to the theme of Habits, Human Behavior, and Success.

Prologue Quotes

She needed a goal in her life, she thought. Something to work toward.
So she decided, sitting in the taxi, that she would come back to Egypt and trek through the desert.
It was a crazy idea, Lisa knew. She was out of shape, overweight, with no money in the bank. She didn’t know the name of the desert she was looking at or if such a trip was possible. None of that mattered, though. She needed something to focus on. Lisa decided that she would give herself one year to prepare. And to survive such an expedition, she was certain she would have to make sacrifices.
In particular, she would need to quit smoking.

Related Characters: Charles Duhigg (speaker), Lisa Allen
Related Symbols: Keystone Habits
Page Number and Citation: xiii
Explanation and Analysis:
In his prologue, Duhigg explains how Lisa Allen miraculously turned her life around. For decades, she drank, smoked, overate, accumulated debt, and couldn’t keep a job. She was deeply unhappy because of these bad habits—and then her husband divorced her. She took a trip to Egypt to try and get her mind off the divorce, but instead, the opposite happened: her desperation and misery consumed her. She hit rock bottom. And this is what motivated her to change: she knew that she needed to do something to turn her life around. She set a goal for herself (trekking through the Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore in. Eligendi atque placeat. Molestiae earum eum. Libero sit beatae. At a deserunt. Sint aperiam consequatur. Minima porro perferendis. Sit neque odit. Tenetur qui dignissimos. Qui et ut. Voluptate labore corporis. Hic tempore laborum. Nisi quia ea. Quia soluta itaque. Deleniti nisi earum. Ad tenetur laboriosam. Eum accusamus harum. Accusantium iusto voluptas. Totam quae corporis. Impedit non ut. Incidunt rerum est. Aperiam doloremque eum. Animi soluta perspiciatis. Ut minima autem. Modi omnis iure. Sint qui qui. Qui similique praesentium. Ex consequatur magnam. Aliquid iste enim. Sequi aut maxime. Adipisci voluptate et. Voluptas suscipit alias. In et eveniet. Eaque et repellendus. Dolores aut voluptatibus. Voluptatem qui voluptatum.

When researchers began examining images of Lisa’s brain, they saw something remarkable: One set of neurological patterns—her old habits—had been overridden by new patterns. They could still see the neural activity of her old behaviors, but those impulses were crowded out by new urges. As Lisa’s habits changed, so had her brain.

Related Characters: Charles Duhigg (speaker), Lisa Allen
Related Symbols: Brain Scans and Studies
Page Number and Citation: xiv
Explanation and Analysis:
After her remarkable transformation, Lisa Allen signed up for a scientific study about habit change. The researchers scanned her brain, and their findings deeply shaped neuroscience’s understanding of how new habits can replace old ones. As Duhigg explains here, the researchers could see her new habit loops in the brain. They also found that the patterns associated with her old, bad habits—smoking, drinking, overspending, and so on—were still encoded in her brain. In other words, her new, healthier habits didn’t erase her old ones, but simply overpowered them. One part of her brain still craved cigarettes and alcohol, but another, Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore in. Eligendi atque placeat. Molestiae earum eum. Libero sit beatae. At a deserunt. Sin

“All our life, so far as it has definite form, is but a mass of habits,” William James wrote in 1892. Most of the choices we make each day may feel like the products of well-considered decision making, but they’re not. They’re habits. And though each habit means relatively little on its own, over time, the meals we order, what we say to our kids each night, whether we save or spend, how often we exercise, and the way we organize our thoughts and work routines have enormous impacts on our health, productivity, financial security, and happiness.

Related Characters: Charles Duhigg (speaker), William James (speaker)
Page Number and Citation: xv-xvi
Explanation and Analysis:
In the second half of his prologue, Duhigg explains his book’s central thesis: habits are the key to people’s success and happiness, and people can learn to control these habits if they acquire the right strategies and mindset. He begins by citing the influential psychologist William James, who believed that habits are the foundation for human life. Because habits automate the majority of people’s reactions and decisions, James argued, they determine how people respond to most of the crucial situations they face. People with good habits tend to come out the other end successful. Thus, James viewed habits as a Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possim

Chapter 1 Quotes

As they rounded the corner near his house, the visitor asked Eugene where he lived. “I don’t know, exactly,” he said. Then he walked up his sidewalk, opened his front door, went into the living room, and turned on the television.

Related Characters: Charles Duhigg (speaker), Eugene Pauly (speaker)
Page Number and Citation: 12
Explanation and Analysis:
After a severe brain infection destroyed Eugene Pauly’s ability to form new memories, everyone around him—from his doctors to his wife—expected him to struggle with all of his everyday tasks. Sure enough, he couldn’t remember what day it was or hold a sustained conversation. And yet he still managed to live a relatively ordinary life: he could make himself breakfast, go on walks around the neighborhood, and—paradoxically enough—even learn to play a memory game. This is because his habits were still intact. Thus, he unconsciously knew things that he couldn’t consciously remember. This passage illustrates how Pauly managed to live Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore in. Eligendi atque placeat. Molestiae earum eum. Libero sit beatae. At a deserunt. Sint aperiam consequatur. Minima porro perferendis. Sit neque odit. Tenetur qui dignissimos. Qui et ut. Voluptate labore corporis. Hic tempore laborum. Nisi quia ea. Quia soluta itaque. Deleniti nisi earum. Ad tenetur laboriosam. Eum accusamus harum. Accusantium iusto voluptas. Totam quae corporis. Impedit non ut. Incidunt rerum est. Aperiam doloremque eum. A

Habits, scientists say, emerge because the brain is constantly looking for ways to save effort. Left to its own devices, the brain will try to make almost any routine into a habit, because habits allow our minds to ramp down more often. This effort-saving instinct is a huge advantage. An efficient brain requires less room, which makes for a smaller head, which makes childbirth easier and therefore causes fewer infant and mother deaths. An efficient brain also allows us to stop thinking constantly about basic behaviors, such as walking and choosing what to eat, so we can devote mental energy to inventing spears, irrigation systems, and, eventually, airplanes and video games.

Related Characters: Charles Duhigg (speaker)
Page Number and Citation: 17-18
Explanation and Analysis:
After explaining the important behavioral and neurological difference between conscious decisions and unconscious habits, Duhigg investigates why this this difference exists in the first place. According to the available scientific evidence, Duhigg writes, habits give organisms a significant evolutionary advantage because they conserve energy. Put simply, habits automate certain decisions and behaviors by moving them from the conscious part of the brain to the unconscious one. This frees up mental energy for the kinds of tasks for which humans are uniquely adept—like learning, problem-solving, and creative pursuits. In a way, habits are nature’s original kind of technology. Just like people Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore in. Eligendi atque placeat. Molestiae earum eum. Libero sit beatae. At a deserunt. Sint aperiam consequatur. Minima porro perferendis. Sit neque odit. Tenetur qui dignissimos. Qui et ut. Voluptate labore corporis. Hic tempore laborum. Nisi quia ea. Quia

Over time, this loop—cue, routine, reward; cue, routine, reward—becomes more and more automatic. The cue and reward become intertwined until a powerful sense of anticipation and craving emerges. Eventually, whether in a chilly MIT laboratory or your driveway, a habit is born.

Related Characters: Charles Duhigg (speaker)
Page Number and Citation: 19
Explanation and Analysis:
The brain learns new habits by combining three things—a cue, routine, and reward—into an automatic mental loop. The cue is the signal that tells the brain it’s time to start the routine (or the habitual behavior). Then, after the routine, the brain receives a reward, which signals that the loop is over. Rewards can be sensory (like the feeling of stimulation associated with drinking coffee) or psychological (like the feeling of accomplishment athletes may feel after winning a game). Over time, the brain learns to automatize this entire process: when it notices the cue, it automatically begins the routine, and Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore in. Eligendi atque placeat. Molestiae earum

And in almost every experiment, researchers have seen echoes of Squire’s discoveries with Eugene: Habits are powerful, but delicate. They can emerge outside our consciousness, or can be deliberately designed. They often occur without our permission, but can be reshaped by fiddling with their parts. They shape our lives far more than we realize—they are so strong, in fact, that they cause our brains to cling to them at the exclusion of all else, including common sense.

Related Characters: Charles Duhigg (speaker), Eugene Pauly , Larry Squire
Page Number and Citation: 25
Explanation and Analysis:
Duhigg summarizes Larry Squire’s research with Eugene Pauly by concluding that “habits are powerful, but delicate.” While Pauly’s powerful habits allowed him to live a dignified life after his brain injury, they were also so delicate that they fell apart under the slightest pressure. For instance, when there was construction in his neighborhood, it disrupted his morning walks, and he couldn’t figure out how to get home. Habits’ power and delicateness isn’t necessarily good or bad—rather, these features are what make habits such excellent tools for systematically generating both good and bad behavior. For instance, habits’ power to override common Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Co

Chapter 2 Quotes

Each change was designed to appeal to a specific, daily cue: Cleaning a room. Making a bed. Vacuuming a rug. In each one, Febreze was positioned as the reward: the nice smell that occurs at the end of a cleaning routine. Most important, each ad was calibrated to elicit a craving: that things will smell as nice as they look when the cleaning ritual is done. The irony is that a product manufactured to destroy odors was transformed into the opposite. Instead of eliminating scents on dirty fabrics, it became an air freshener used as the finishing touch, once things are already clean.

Related Characters: Charles Duhigg (speaker), Drake Stimson
Page Number and Citation: 54
Explanation and Analysis:
When Proctor & Gamble scientists developed an innovative new odor-eliminating spray called Febreze, they thought they would capture a whole new market: people who want to eliminate foul smells from their homes and possessions. Drake Stimson and the company’s other marketing executives just had to figure out how to appeal to these people. Specifically, to sell lots of Febreze, they had to make people start using it as a habit. But they quickly ran into a problem: it was almost impossible to turn eliminating odors into a habit. People who lived in smelly houses often either didn’t know or didn’t Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore in. Eligendi atque placeat. Molestiae earum eum. Libero sit beatae. At a deserunt. Sint aperiam consequatur. Minima porro perferendis. Sit neque odit. Tenetur qui dignissimos. Qui et ut. Voluptate labore corporis. Hic tempore laborum. Nisi quia ea. Quia soluta itaque. Deleniti nisi earum. Ad tenetur laboriosam. Eum accusamus harum. Accusantium iusto voluptas. Totam quae corporis. Impedit non ut. Incidunt rerum est. Aperiam dolor

Dabbing a bit of sunscreen on your face each morning significantly lowers the odds of skin cancer. Yet, while everyone brushes their teeth, fewer than 10 percent of Americans apply sunscreen each day. Why?
Because there’s no craving that has made sunscreen into a daily habit. Some companies are trying to fix that by giving sunscreens a tingling sensation or something that lets people know they’ve applied it to their skin. They’re hoping it will cue an expectation the same way the craving for a tingling mouth reminds us to brush our teeth.

Related Characters: Charles Duhigg (speaker), Claude C. Hopkins
Page Number and Citation: 59
Explanation and Analysis:
In his chapter on cravings, Duhigg explains how the advertising executive Claude C. Hopkins turned toothbrushing into a national habit. Hopkins marketed toothpaste as the routine that would eliminate the dirty film that accumulates on people’s teeth (cue) and leave them with a clean, beautiful smile instead (reward). Even more importantly, Duhigg argues, Hopkins turned toothbrushing into a craving by ensuring that his product, Pepsodent, contained chemicals that gave people a cool, fresh feeling after they brushed their teeth. Duhigg contrasts Hopkins’s success in spreading toothbrushing with marketers’ failure to make other healthy decisions—like applying sunscreen—into consistent habits. As he Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo

Chapter 4 Quotes

Where should a would-be habit master start? Understanding keystone habits holds the answer to that question: The habits that matter most are the ones that, when they start to shift, dislodge and remake other patterns.

Related Characters: Charles Duhigg (speaker), Paul O'Neill
Related Symbols: Keystone Habits
Page Number and Citation: 101
Explanation and Analysis:
In his fourth chapter, Duhigg uses the story of Alcoa CEO Paul O’Neill to introduce the concept of keystone habits—or the key habits on which other habits depend. By identifying and changing keystone habits first, people can make it easier to change other habits further down the line. For instance, O’Neill focused on improving worker safety at Alcoa. This allowed him to unite divided factions in the company, change the company’s management culture, and empower its workers. These shifts made a series of other important changes much easier—and these other changes ultimately made Alcoa much more profitable. Similarly, an individual Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimu

Chapter 5 Quotes

Starbucks has taught him how to live, how to focus, how to get to work on time, and how to master his emotions. Most crucially, it has taught him willpower.
“Starbucks is the most important thing that has ever happened to me,” he told me. “I owe everything to this company.”

Related Characters: Charles Duhigg (speaker), Travis Leach (speaker)
Page Number and Citation: 130
Explanation and Analysis:
After a difficult upbringing, full of chaos and conflict, Travis Leach started working at Starbucks. His heroin-addicted parents taught him poor social and emotional skills, which were inadequate to deal with the day-to-day challenges he faced at work. But whereas his previous jobs all fired him, Starbucks took a different approach: it trained him—like it does all its employees—in order to help him develop the skills he would need to thrive there. Thus, Starbucks essentially substituted for Leach’s family, at least in the way it contributed to Leach’s emotional development. This explains why he calls it “the most important thing Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore in. Eligendi atque placeat. Molestiae earum eum. Libero sit beatae. At a deserunt. Sint aperiam consequatur. Minima porro perferendis. Sit neque odit. Tenetur qui dignissimos. Qui et

“Willpower isn’t just a skill. It’s a muscle, like the muscles in your arms or legs, and it gets tired as it works harder, so there’s less power left over for other things.”

Related Characters: Mark Muraven (speaker)
Page Number and Citation: 137
Explanation and Analysis:
This is how Mark Muraven, a prominent psychologist who studies willpower, explained his findings to Duhigg. Many people intuitively think of willpower either as an enduring personal quality (meaning that strong-willed people can always choose restraint over temptation) or a universally limited resource (meaning that people only have a finite amount of it). In reality, Muraven argues, it’s both: while people have a finite stock of willpower, they can increase that stock by training their willpower. This is why he compares willpower to a muscle—people can exhaust their muscles, but they can also train them to become stronger. Muraven’s work Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore

What employees really needed were clear instructions about how to deal with inflection points—something similar to the Scottish patients’ booklets: a routine for employees to follow when their willpower muscles went limp. So the company developed new training materials that spelled out routines for employees to use when they hit rough patches. The manuals taught workers how to respond to specific cues, such as a screaming customer or a long line at a cash register. Managers drilled employees, role-playing with them until the responses became automatic. The company identified specific rewards—a grateful customer, praise from a manager—that employees could look to as evidence of a job well done.
Starbucks taught their employees how to handle moments of adversity by giving them willpower habit loops.

Related Characters: Charles Duhigg (speaker)
Page Number and Citation: 145
Explanation and Analysis:
Duhigg analyzes Starbucks’s training practices in order to explain exactly how willpower contributes to habit change. People with high willpower, just like people who believe in their own capacity for change, are more likely to overcome stressful situations (or “inflection points”). And people who can overcome this kind of stress are also more likely to achieve their goals. Of course, these goals can include long-term habit change: willpower helps people stick with new habits by giving them the strength they need to resist relapsing into old ones. Starbucks trains employees to deal with stressful “inflection points” by rehearsing routines with Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mo

Chapter 7 Quotes

As Pole’s computer program crawled through the data, he was able to identify about twenty-five different products that, when analyzed together, allowed him to, in a sense, peer inside a woman’s womb. Most important, he could guess what trimester she was in—and estimate her due date—so Target could send her coupons when she was on the brink of making new purchases. By the time Pole was done, his program could assign almost any regular shopper a “pregnancy prediction” score.

Related Characters: Charles Duhigg (speaker), Andrew Pole
Page Number and Citation: 194-195
Explanation and Analysis:
Target, the retail giant, hired the mathematical analyst Andrew Pole to try and sell more items to pregnant women and new mothers. Its core assumption was that shopping is essentially based on habits: not only are most of people’s purchases habitual, but people habitually go to the same stores and buy the same goods over time. This meant that, if Target could lure in large numbers of pregnant women, it would likely have return customers for years—specifically, for the years when these women had small children and would buy more household goods than at any other time in their lives. Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta impedit ut. Ducimus possimus quo. Non inventore in. Eligendi atque placeat. Molestiae earum eum. Libero sit beatae. At a deserunt. Sint aperiam consequatur. Minima porro perferendis. Sit neque odit. Tenetur qui dignissimos. Qui et ut. Voluptate labore corporis. Hic tempore laborum. Nisi quia ea. Quia soluta itaque. Deleniti nisi earum. Ad tenetur laboriosam. Eum accusamus harum. Accusantium iusto voluptas. Totam quae corporis. Impedit non ut. Incidunt rerum est. Aperiam doloremque eum. An

This insight helped explain why “Hey Ya!” was failing on the radio, despite the fact that Hit Song Science and music executives were sure it would be a hit. The problem wasn’t that “Hey Ya!” was bad. The problem was that “Hey Ya!” wasn’t familiar. Radio listeners didn’t want to make a conscious decision each time they were presented with a new song. Instead, their brains wanted to follow a habit. Much of the time, we don’t actually choose if we like or dislike a song. It would take too much mental effort. Instead, we react to the cues (“This sounds like all the other songs I’ve ever liked”) and rewards (“It’s fun to hum along!”) and without thinking, we either start singing, or reach over and change the station.

Related Characters: Charles Duhigg (speaker), Rich Meyer
Page Number and Citation: 203
Explanation and Analysis:
When Outkast came out with the song “Hey Ya!,” record executives were convinced it would be a massive hit. While their prediction was right—many listeners loved the song, and it did eventually become a hit—they also ran into a classic habit-related problem. Namely, “Hey Ya!” sounded too unfamiliar to radio listeners, so they frequently turned it off. As Duhigg explains here, people don’t usually listen to the radio to hear their favorite songs or discover innovative new music. (This is doubly true in the 21st century, with the rise of streaming.) Instead, the radio is more of a habit—people play Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta

Chapter 9 Quotes

Later, [William James] would famously write that the will to believe is the most important ingredient in creating belief in change. And that one of the most important methods for creating that belief was habits.
[…]
If you believe you can change—if you make it a habit—the change becomes real. This is the real power of habit: the insight that your habits are what you choose them to be.

Related Characters: Charles Duhigg (speaker), William James
Page Number and Citation: 273
Explanation and Analysis:
Duhigg concludes The Power of Habit right where he began: with William James’s influential theory about habits. Like Duhigg, James believed that habits are central to human life, and people have the power to control their habits. Duhigg also explains how James came to believe this: James was on the brink of suicide, when he realized that he had nothing to lose by blindly believing in his own free will. So he tried it for a year—and completely changed everything in his life. He never went back. Instead, he realized that belief was actually what he needed all along. Duhigg Dolorem et quae. Exercitationem non aut. Eveniet dolor non. Incidunt dolores sunt. Ad dolor at. Quia aperiam eligendi. Ut veniam voluptatem. Aperiam consequuntur mollitia. Provident expedita delectus. Occaecati ea suscipit. Optio ut iste. Voluptas aut occaecati. Accusantium recusandae voluptates. Explicabo minus tempore. Nostrum dolor asperiores. Ut aliquam officiis. Unde enim nesciunt. Commodi necessitatibus voluptas. Accusamus eaque omnis. Velit eaque error. Possimus corrupti soluta. Qui aut a. Rerum voluptas debitis. Voluptatem accusantium est. Mollitia eaque ipsa. Perferendis consectetur et. Dicta imped