My sister-in-law tried Ambien. She didn't realize how quickly it would work. She took it, then planned to go to the bathroom, brush her teeth, etc., and go to bed. She fell so sound asleep on the toilet that her husband couldn't wake her up!
When I need a little help falling asleep, I sometimes take Melatonin 3. I got it at GNC. I read that when you are on the computer or watching TV late, your body thinks it is still daytime and your natural melatonin levels are thrown off, and that the melatonin pills fool your body into realizing it is nighttime.
Hot chocolate and a warm bath right before bed help me a lot as well.