The Power of Habit by Charles Duhigg

All our life, so far as it has definite form, is but a mass of habits – practical, emotional, and intellectual – systematically organized for our weal or woe, and bearing us irresistibly toward our destiny, whatever the latter may be.

– William James

This book is fantastic.

I have been telling anyone that will listen to me about it. I can bring it up in almost any conversation.

The Power of Habit explains Why we do what we do and how to change.
Here is an Amazon link if you want to check it out. (affiliate link)

The review is what I found most interesting or important. These are my glorified notes.

Since these are my notes, you should check out the book for yourself. Perhaps you’ll find something else more useful.

I believe the appendix is the most actionable and useful part of the book. It applies the knowledge, research, and framework of the rest of the book.

The appendix is named, A Reader’s Guide To Using These Ideas – so, that’s appropriate.

Applying the ideas comes down to using a framework and having a plan.

Let’s review how habits work. All habits follow this loop:


And, so on…it’s a cycle.

  • The cue is the trigger that tells you execute a certain set of actions.
  • The routine is that set of actions, and it happens on autopilot. Think about pulling out of your driveway – you didn’t need to consciously decide  which way to turn.
  • The reward is the feedback that your brain uses to decide if the habit is something useful to remember.

The habit becomes automatic from start to finish, and your brain can reduce its level of participation. That is why you can walk and talk at the same time – you don’t need to concentrate on walking as much as, say, a toddler.

Let’s get back to applying this stuff.

Applying the ideas fall into two main areas:

  1. Changing existing habits
  2. Creating new habits

Changing existing habits

Here’s the framework

  • Identify the routine
  • Experiment with rewards
  • Isolate the cue
  • Have a plan


The idea is to determine what craving you are trying to satisfy when you get the cue. You can try to adjust the reward to give you an insight about what you are craving. 15 minutes after the experiment write down the first couple thoughts that come to mind. It doesn’t need to be a journal entry – 5 words or less should suffice.

The thoughts will give you insight about what you are craving. You may write something like this:



The example in the book is about how the author got a cookie in the afternoons and wanted to change the habit. He tried to eat a healthier snack instead, but that didn’t seem to satisfy the craving. He noted that he walked to the cafe to buy the cookie, so he tried to walk for a few minutes instead. He realized that didn’t do the trick. He eventually figured out that he craved the conversations with his colleagues in the afternoons. Instead of buying a cookie, he can go to a friends desk and have a chat for 15 minutes then finish the day without cookies.

There are five main categories of cues:

  • Location
  • Time
  • Emotional state
  • Other People
  • Immediately preceding action

When you figure out the habit loop for yourself, then you can take action to change the behavior. You can plan for and anticipate the cue while choosing a behavior to deliver the craving you need. The author determined that he craved company and conversation rather than the cookie.

Creating new habits

You need to architect your own habit loop. It is really hard to rely on self-discipline and will power to form new habits. You can develop

You can develop cues for yourself.

Let’s say you want to do pushups every day. You can design the routine like this:

  • Cue: Brush your teeth after waking up.
  • Routine: Do XX pushups.
  • Reward: Mark your progress on an app, like, or just mark it on your calendar.

Creating a new habit can take the same kind of experimentation as changing a habit.

Be patient and take the time to note the cravings. That way you can adjust the cue or reward as needed.


Other Cool Case Studies in the Book

The book is filled with interesting facts, case studies, and examples. Here are a few that I found particulary interesting.

Keystone habits

These are habits that have far reaching impacts. They have the power to transform everything.

The example in the book is when Paul O’Neill took over as CEO for Alcoa. The author, Charles Duhigg said it well for NPR:

“When he first got hired, everyone expected him to come in and say, ‘I’m going to concentrate on profits and efficiency and making people work harder.’ But instead what he said was, ‘My No. 1 priority is transforming worker safety habits within this company, so that we have zero injuries’ — which is a big deal in a company where all of your employees handle molten metals,” Duhigg says.

By focusing on worker safety and examining how an inefficient manufacturing process is dangerous to employees and produces subpar aluminum, O’Neill found a way to bring the entire corporation in line.

He catalyzed a series of better practices and habits throughout Alcoa, making it one of the world’s most profitable and efficient companies.

The managers were forced to look at the root causes of the issues and report to management. Plus, the managers had to provide a plan on how the root cause of the injury would be eliminated. The managers had to do this very quickly, too.

The result was that most of the root causes were fixed by improving the equipment or the processes. The other result was that the communication channel improved in a dramatic way – from the factory workers to the CEO.

The habit of success – when willpower becomes automatic

This is one of the main reasons that I started waking up earlier. Willpower is like a muscle and it gets fatigued.

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.

― Charles Duhigg

The example: There was a 4 month experiment to improve willpower. 29 people were enrolled in a money management program where the participants were asked to reduce luxuries and keep a log of all their purchases.

The participants improved their finances over time. There was a side effect.

As people strengthened their willpower muscles in one part of their lives—in the gym, or a money management program—that strength spilled over into what they ate or how hard they worked. Once willpower became stronger, it touched everything.

― Charles Duhigg

I can’t say it better than Duhigg did. It goes to show that you can focus on one habit (or one area in your life) to work on at a time. If you try to change too much at once, it can become overwhelming.

Improving the one habit can automatically improve other areas without any additional effort.

If you’re interested in habits at all, you should definitely read this book!

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.

― Charles Duhigg

If you read the book, what did you think of it?
8 comments… add one
  • Agree with You Charles 🙂 Planning is everything. Had to learn this the hard way. With a proper plan and the right treat to ourselves, success is evident.


  • Steve Lanning

    I’ll look to pick up the book–soon, Doug. Thanks for posting this most insightful exegesis of habits–creating good ones and killing the bad ones. I remember sitting next to Robert Ringer in a seminar in New York in the early 1980s on creating good productivity habits. I think the bull sessions afterwards launched a couple of books from that audience in the habits genre. It’s especially relevant for us Baby Boomers who have the habit of getting fat, dumb and happy–and cut ourselves off from the marketplace where we should be getting and staying sharp!

    • Hey Steve – Thanks for the comment. I really can’t recommend it enough. Two of my brother in laws have read the book already.

      It is a quick read…let me know when you finish reading it, Steve. Cheers

  • Jakir

    This blog was originally created around SEO and niche sites. What’s up with all the posts about productivity? This isn’t what I signed up for.

    • Hi Jakir, thanks for the comment & feedback.

      I am definitely looking to post more productivity related content, and I may shift that over to another domain.

      There will be new SEO content coming up in the next few weeks so I hope that will be more of what you’re looking for.

      What is the #1 topic that you want to learn more about, @disqus_MmF45JIMDH:disqus?


  • Thank you for sharing this book review. I think it goes very well with SEO and Niche Projects as bad habits can sometimes pull us away from achieving goals we may have for our blogs or websites. I know at least this is one of my issues so I’ll let you know how it went after I finish the book.

    • Hey @andreacincora:disqus – Thank you! I thought so too. A lot of us can use the ideas in the book no matter what we are working on.

      Please do let me know when you have finished the book. 🙂


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