Yeah, valerian is good.
However have suffered insomnia for years to the point of being sent to a sleep clinic, where I was told that..hey...I had insomnia!
Anyway, they did tell me methods of dealing with it. The best one is, when in bed, consciously do relaxing. Eg, work from feet upwards, telling muscles to relax etc. Don't clench and unclench them though, just focus on them to relax them.
Other tips were, cut out all caffeine incl tea, choc, coke and coffee before 2pm in afternoon.
If you are awake for more than 20 mins, get up and go into another room (try and keep lights dim) and do something like light reading, eg a novel. When you start to feel tired (and you will believe me) go back to bed. If not asleep in 20 mins do same agin etc etc.
Go to bed when sllepy and not before. Don't clockwatch, and keep room as dark as possible.......
However as i said I found relaxation the best, but valerian is good. Also herbal nytol as well, in fact normal nytol pretty good too.
Insomnia is the pits it makes you feel really crap, I think perhaps you should mention it to your doctor as well.