i can't sleep :(

I've been trying to get to sleep for the last two hours. no success. I tried having a nice relaxing hot bath with lavender oil... then I made my bed with nice fresh sheets and put on some ultra comfy pj's, warm, just out the dryer. I listened to relaxing music, read a chapter of a book and then resorted to counting sheep, which didn't work. I tried counting fit blokes jumping over those fences, but that just made me laugh... I've just had a bite to eat and a hot drink... that didn't work either, so I got up and started doing some work on the computer. I'm bored with it but wide awake. It's so annoying. I've got to be up in 6 hours and nothing is working. You know what, I think I'll go for a walk round the block and get some fresh air... maybe that will tire me out???
What do you do when you can't sleep? Is anyone on line at the moment?
What do you do when you can't sleep? Is anyone on line at the moment?