When I'm sitting all alone, in the middle of the night at work, in my little 10x10 foot shack, in the dark, for 8 hours, I keep saying "soup" over and over again. I say it in an evil voice louder and more intensely evil each time. Then I pick up the pace, and picture close ups of soups in red lighting until I actually make myself feel afraid.
This is how I keep myself awake.