Thats why signing kids up for piano lessons or sports is so important. It has nothing to do with creating a good musician or a five-year-old soccer star, said Heatherton. When you learn to force yourself to practice for an hour or run fifteen laps, you start building self-regulatory strength. A five-year-old who can follow the ball for ten minutes becomes a sixth grader who can start his homework on time.

The Power of Habit by Charles Duhigg