What are some things I can do to help me fall asleep?

I normally take about 10 mg of melatonin a night. Also about 100 mg of diphenhydramine HCL (benadryl). Dimehydrinate (dramamine) doesn't do **** and zolpidem (ambien) works makes me see things, which would normally be fun but I don't enjoy seeing things moving and the room spinning while I'm trying to sleep. I just have so much trouble, I might have insomnia and I should probably take meds, but I'm too cheap. I usually get about 3-5 hours a night.