when it's time to go to bed (11pm-12am) pop 2 of these
http://www.amazon.com/Schiff-Melaton.../dp/B000FCEB2G it just amps up your bodies natural levels of melatonin and won't make you dependent like pharmaceuticals do.
I use to toss and turn for HOURS every night trying to sleep and when I got that shit I was assed out like a champ within 20mins