Originally posted by Mr.74
So do i start thinking about things or do phyiscal stuff to wake myself up
Whatever it takes to get your mind functioning. Personally, I don't do anything physical because once I get my blood pumping, then it's a long time before I can get back to sleep.

I multiply prime numbers in my head, something like 19 X 23 or 17 X 19.
You might also try to work out some kind of logic problem, or write code in your head. I do this while sitting in the dark so as not to disturb my wife.

If you are able to get up and turn on a light, you might try something like a crossword puzzle.

Good luck!