Have you tried doing some physical exertion right before you lie down? Lately i've been doing some pushups until i cannot pushup no-more right before bed (being fairly unfit, i get to about 15 lol but its faster than getting tired out on the exercise bike) and then i stick the 60-minutes-white-noise mp3 on a loop and doze off pretty well. Seems to work better than cannabis (I am on a T-break) for me and without exposing the mind to mind-altering television programming.