We are what we do.
Each of us has activities, things we do day in and day out, over and over. Our habits become part of our psyche—part of our identity.
A famous statistic from Maxwell Maltz said that it takes a minimum of 21 days of doing something to make it a habit. Subsequent research suggests that it takes more like a minimum of two months and up to eight months before an activity becomes ingrained. So, if we want an activity to become part of our lives, we know what we have to do to make it happen.
However, knowing this is easier than doing it. We have to be motivated to do something day in and day out, for that long. To get that kind of motivation, we must have a clear image of how and why those activities should be part of our lives. That means that we should be able to consistently fit them into our routines and recognize what they will contribute to our happiness, health, or fulfillment.