Valerian root mixed with chamomile is great for relaxation and sleep. I take it with tea whenever I can't sleep.
Valerian Root/ Melatonin
Valerian didnt do anything for me, but by all means try it. Melatonin on the other hand even at 2mgs helped me fall asleep, so for me it works really well, I try not to depend on it too much and currently I havent been taking it. Only when I really need to I do.