This is along the lines of self-hypnosis also. "The Power of Habit" book might be worth reading but the "gist" of it is brains have basal ganglia that have automatic functions, so it seems the most effective scientifically understood way to get into a good habit is just to be consistent, and eventually a person will feel like they're just "going through the motions" rather than forcing themselves. I've had this feeling with workout and other routines, but I've also felt like my mind was almost white-hot after trying to keep myself busy with at least something for a business quarter. Assuming this post can provide and facilitate insight on this topic.