LOL! I'd actually forgotten to list coffee as it's so self-evident, but you're quite right, I should.

the best tip for worrying about insomnia is one I'll cover tomorrow. I got this tip off a website and was amazed how much difference it made.

Don't have a visible clock in the bedroom. Once I couldn't see it was 4am, I stopped worrying about being briefly awake at 4am, and as far as I can tell, I've stopped waking at 4am.