When was the last time you were engaged in something challenging, absorbing and fun? Was it hard to continue with that activity? Probably not. That’s what we call intrinsic motivation. It means doing an activity because of the joy and satisfaction it gives you. Whenever you experience feelings of enjoyment, mastery, personal accomplishment, and excitement, you are intrinsically motivated to go on. If a habit consists of these, it is easy to keep it up.  But too many people focus…