Nothing is stronger than habit. Simply put, a habit is a behavior that starts as a choice, and then becomes a nearly unconscious pattern. Every habit, no matter how simple or complex, has the same structure, which we call the "habit loop." There is a cue or a trigger that tells your brain to go into automatic mode. Then there is the routine, which can be physical or mental or emotional behavior. Finally, there is a reward. Once you understand how habit loops work, you can start changing them.