Praying and clearing my mind of negative and or stress provoking thoughts helps me. Also, turning off the TV. helps. Prescription drugs can become bad habits, and aren't good for you.

I had problems falling asleep and spent at least two hours each night twisting and turning in bed. I think the problems started after a period in college when I had a huge paper to do combined with exams coming up. I got help from a psychologist who was trained in CBT (cognitive behavioral therapy). In the treatment the focus was on changing your habits associated with sleeping. I wasn't allowed to do anything but sleep in my bed and I was told only restrict my time in bed to the hours I really slept. It was like magic. After two weeks it only took me fifteen minutes to fall asleep. Therapy can be a bit costly, but it was really worth it. If you're on a tight budget I would recommend self-help books with CBT-treatment for sleeping disorders.