Are you having any caffeinated drinks in the afternoons or with dinner? That can contribute. It can be sneaky too, like in iced teas or in sodas that you order to drink when out that you might not even think about. Also, start winding down for bed at least an hour if you can, but a little bit more than that would be even better! Like doing quiet activities, maybe reading instead of watching TV. Listening to music. Also, there are some decaf teas that are supposed to help with sleep. I've used a sleep system at home with quiet music, lavender aromatherapy oil diffusing system with candle light under it in my room, and using the music through my iPod and 'sleep phones" that came with the first bottle of lavender oil and diffusing system that I bought. There are many techniques if you google "sleep hygiene" and if you are still having trouble, talk to your doctor.