Integrate peak-state habits in your daily life. Most peak-state habits involve the use of your body: Change the way you move, and you'll change the way you feel.

The most likely reason you feel unmotivated is that you are in a lousy state of mind. It can be caused by various things, like:

Forcing yourself to work is like swimming against the current. You'll need a lot of force to get to your destination.

You can produce motivation at your own command if you understand how it works.