Research shows it takes anywhere from 18 days to 254 days to form a new habit. On average, it takes 66 days to form a habit. Once you make a certain behavior automatic, you won’t have to rely on your self-discipline to keep doing it. When presented with a specific cue, you will automatically react to it just like you trained yourself to do. It’s the simplest way to introduce more discipline in your life.

Please refer to the book for more details on this activity.