"Chew some valerian root and get more exercise."
On the topic of sleep in general you can do a few things to get the most out of your night--lately I've been waking up before my alarm but if that weren't the case I'd try this one:
http://veenix.blogspot.com/2005/10/alar ... ke-up.html
Also if you want to try a natural sleep aid I suggest melatonin, you can get sublingual tablets at any health food store. It's a hormone that your body produces to help regulate your sleep cycle; part of the system that cues you to go to sleep. It is a subtle effect but I've found it very useful, it just helps you fall into natural sleep. Dosage will vary depending on the person--my wife only needs about half a milligram but I'll usually take 1.5-3 mg. Men usually need more than women.
http://en.wikipedia.org/wiki/Melatonin
You can use it to help adjust your circadian rhythms, then after awhile if you keep a regular schedule you shouldn't need it much anymore.