Go jogging. Write in a journal. Read, meditate,

CLEAR YOUR HEAD.

It's not hard. Just try not to plan too far ahead. You don't want to overwhelm yourself, which is what it sounds like you do. It's best to do complex tasks during a low state of stimulation. Hence, you don't want to down three espressos before logging on. Rather, you want your heart rate to be at a normal rate (for as long as you can keep it there.)

Good luck!