My husband works rotating shifts and is not allowed by his employer to take any sleep-inducing medications. Some days he gets home at 2:30 p.m. and has to head back to work at 9:30 p.m. not to get home again until 6 a.m. He usually cannot sleep at 6 p.m., so instead he has learned to just go lie down, close his eyes and relax for a few hours. Sometimes he does fall asleep, but most often he doesn't. Still, the relaxation leaves him fairly well rested - at least well enough to work your airplane. (Now there's a thought that should help you relax. )