Habits are built by making a behavior obvious, attractive, easy and satisfying, and broken by inverting each of those four.

So, I call these the four laws of behavior change. Make it obvious, make it attractive, make it easy, make it satisfying. And you don't need all four every single moment of the day or every habit that you build. But the more that you have those four forces working for you, the more likely you are to stick with it.