Stoic Coffee Break

Keystone Habits: How One Good Habit Can Change Everything

July 29, 2026·13 min
Episode Description from the Publisher

Habits are a key part of our lives. We have helpful habits that help us accomplish what we set out to do. We also have some that we’d like to get rid of. But what if I told you that sometimes one good habit is all it takes to reorient our lives and make lasting changes? In this week’s episode we’ll discuss the importance of keystone habits and how you can find yours. "All our life, so far as it has definite form, is but a mass of habits." — William James I love to cycle. Ever since I watched the Kona Ironman competition on TV on 2003, and decided that I wanted to be that hardcore, cycling has become become a key part of not just my weekly workout routine, but a core part of my identity. While for some it may sound like torture, a 35 mile ride on a warm Saturday is my idea of an afternoon well spent. But what this one habit brings to my life is far more than just fresh air and great legs. It influences other areas of my life in profound ways. You see, when I started training for triathlons, I was not what a triathlete should look like. I was out of shape. At 195 pounds (about 88 kilograms for you non-Americans) and only 5’7” (170 cm) tall, I was carrying a lot of extra weight. I had bad eating habits, preferring Mt. Dew over water. I could barely run a 5k in under 35 minutes. In high school I could do it in half that time. But once I started down that path, it became the centering principle of my life. I would ride my bike to work, often taking the long way home. I changed my diet to healthier food and smaller portions. When I would go out to eat, I would divide my meals in half, setting aside the second half for home, so I wouldn’t overeat. Because I was working out more, I slept better. And while I only competed in a single short course triathlon before focusing on just cycling, it changed the direction of my life. My gym routine, my diet, my alcohol consumption, and my sleep are all in service to helping me maintain my fitness for the bike. This in turn keeps me healthy, functional, and feeling better mentally. This is what Charles Duhigg, the author of The Power of Habits, calls a “keystone habit”. In short, it’s a core habit that influences other behaviors. It reenforces other habits making them easier to follow. Once you find that habit, it orients the rest of your life around it. The Philosophy A keystone habit isn’t necessarily the most important habit from a moral sense. Cycling doesn’t make me a more virtuous person in itself. A keystone habit is the habit with the highest leverage. It creates an identity shift that makes virtuous choices easier by default, not through willpower. In my case because I consider myself a cyclist, my other choices are filtered through the question: “what would a cyclist do?” In my case: eat less dessert, skip the beer, and get a good nights sleep. A keystone habit doesn’t have to be physical one. It can also be a cognitive one as well. Marcus Aurelius had a keystone habit of writing in his journal. That habit grounded him in way that had an influence on everything else in his life. How he ruled, the books he read, the people he spent time with, how he treated other people. It was a high leverage habit that helped him be the kind of person he wanted to be. Seneca had a habit each night of reflecting on his day. He would take stock of what he did well that day and what he could improve. This simple habit of taking time each day became an anchor for finding his weak spots and resolving to do better tomorrow. Creatures of Habit So why are good habits such an in important part of of lives? Because we are creatures of habits. Literally. Humans develop habits so that we don’t have to think through how to do something every time we do it. Think about if you had to consciously manage each step in getting dressed? If we had to give our full attention to each button or zipper, or each time we had to tie our shoes? It would be tiring. Habits save us time and energy. Think about the first time you learned how to tie your shoes. How much time and effort did that take? It wasn’t easy. But once you got it down, then you could do it without having to really think about it. Bad habits come about the same way. We often pick them up without thinking about them, only to find that they are much harder to put down. I’ve had plenty of friends who picked up smoking because they hung around friends that were smokers. It was easier just to go along to get along. But years later, when trying to quit, they routinely complained about how hard it was, wishing they have never started. Your eating habits were probably shaped by the household you grew up in. As a child you really didn’t have a choice in what food was available in your house. But those choices influenced you and created habits that you probably carried into adulthood. Until w

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