sleep depravation

Sometimes it seems like I can never crack down and get anything done. I have trouble motivating myself to be productive. Yet, when I try to go to sleep at night, my head runs and runs and runs, a mile a minute, stressing about this and that, making lists for tomorrow, and cataloging what didn't get done today... I can't fall asleep. I cant shut my head off. So I lay here, awake, doing nothing, because its too late to run errands, everything is closed, everyone's asleep. At some point, I'll finally fall asleep, only to wake up later than I wanted to or needed to tomorrow, and fall behind even more.