The pain of resisting a habit eases once a new habit forms. You can do that in forty-five days if you repeat a new thought or behavior every day without fail. If you miss a day, start over with Day One. The new choice will not make you happy on Day One, and it may not make you happy on Day Forty. Even on Day Forty-Five, it cannot trigger happy chemicals constantly. But it will invite enough electricity to free you from a vicious cycle.
