i agree with Catlover on this one...i don't feel that any kind of medication, herbal or otherwise is the way to go.
Tips that work for me, to help me fall asleep.
Try to have a night time routine, that you follow before going to bed. Try and get to bed at the same time each night if possible (i find this difficult to do, as i do shift work, but i can make it work if i'm on a block of late starts)
Have something to eat, like a bowl of cereal...It's light, but it fills you up (i can never go to bed hungry)
Also, if there is something bothering you, try talking it out with someone during the day (doing it before bed may result in you being up all night ) or failing that, write it down.
I keep a journal, which i write in almost on a daily basis, whenever i feel there's something in my head i need to get out.
Oh yeah, and one other thing. If you don't need to be up in the morning, don't set your alarm. I find it jolts me right out of sleep and messes with my recall.
Hope this helps!
And by the way, Welcome to the board! You've been here a couple of days so far, how are you liking it?