The root of behavior change and building better habits is your identity. Each action you perform is driven by the fundamental belief that it is possible. So if you change your identity (the type of person that you believe that you are), then it’s easier to change your actions.
This brings us to an interesting question. How do you build an identity that is in line with your goals? How can you actually change your beliefs and make it easier to stick with good habits for the long run?