I used to stay awake for days with no sleep, for around 3 months i was on/off. Only cure i found was 2 mouthfuls of Strait JD and im feeling tired in about 20 mins and off i go.....
Valerian Root is a good idea. It comes in pill form, but they smell horrible. You can also get it in liquid form, with a rubber dropper lid. If you use too much it can 'burn' your mouth if you always drop it in the same place. Bach makes something called Rescue Remedy which helps with stress, I think they also make something called Sleep Remedy or Rescue Sleep or something. You can find them at stores like Fred Meyers or Super Supplements.