What do you do when you have insomnia?

If you are fortunate enough to not be plagued with insomnia, you can go back to sleep and stop reading here!

What is your favorite was to pass the time when you are experience insomnia? What have you found to be effective in combating middle of the night wakefulness?

When I have been experience several nights of debilitating insomnia I will pop one Tylenol PM gel cap and that seems to keep me from waking fully before sunrise. I pray, read, pray and never look at the clock.