Have you changed your habits recently? Diet, exercize, relationships? Some good things to help your body fall into the sleep pattern (some fall under the category of DUH, but I'll list them anyways)
1) No caffeine after 6pm (assuming you go to sleep around 10pm)
2) No sugar as above
3) No exercize two hours before sleeping
4) No big meals within one hour - two hours of going to sleep
5) Exercize regularly - a worked out body is a happy body
6) Turn off bright, overhead lights and use low level lighting at night
7) Avoid stress/over-stimulating your brain, try reading or journaling or my fav, gaming, to relax your mind
I would avoid sleeping pills because the sleep the give you is a medicated, less recuperative sleep. Try other things first like tea or (ew) warm milk. Best of luck and let us know how you are doing.
