Sleep Advice

I've been having a little trouble sleeping lately, and I stumbled across this article. I don't agree with number 3. Exercising later at night actually makes me tired. Also, if I get up and watch television, there is no going back to bed for me. I've been taking valerian root, and it works ok. I can take it for awhile, but then it's recommended to take a week off. I'm usually left with no sleep that week. Any ideas?