Seriously, don't take any drugs (tylenol, weed, alcohol, etc.) to sleep. That's just developing bad habits. I've got this app on my iPhone and it works wonders, not only for sleep but also for other things like euphoria, which is odd, but I swear it works. Here's a link...
http://itunes.apple.com/app/brain-wa...307219387?mt=8
Listening to music can also do the job.
Also, just follow normal sleep tips. Make sure your room is completely dark (I'm even talking about the little lights from your alarm clock...get rid of it if you can). If you can't make your room dark, try an eye mask. Make sure that your room is the right temperature and if you feel the need, maybe burn a candle or something with a pleasant scent before sleep. Taking a hot bath before hand can also work wonders. There's so many tips like this out there, you just have to search for them. There's never an easy way out, like tylenol, lol.