juju, try physical activity. A punching bag, swinging a baseball bat or an axe, sometimes even popping bubblewrap, will work. Just a few minutes of concentrated effort can sometimes be enough to relieve the pressure.
I remember reading about a woman that couldn't unwind enough to get to sleep. One night she knocked something off the nightstand and it rolled under the bed, so she got out of bed and ended up crawling all the way around the bed on her hands & knees to retrieve it. When she climbed back into bed, she fell asleep immediately. From then on, whenever she didn't fall asleep immediately, she'd crawl around the bed on all fours. Worked every time.
