i have a bit of trouble with insomnia from time to time. I attribute alot of it to the no-xplode. Here's an article that may help you out. It's about valerian root. The melatonin you take isn't really a sedative or "sleep promoter" as much as it is a "cycle regulator." It's more to keep your body's circadian rhythms in check. Anyways, here you go:
http://www.aafp.org/afp/20030415/1755.html