In the listening to your body category I would add to check your hydration and warmth levels. Cold feet will keep me awake as will needing another glass or two of water.
And in the "distracting yourself" category I would add the time-honored camping tradition of promising yourself that you will not fall asleep until you hear X sound -- an owl hoot, a coyote, a train in the distance. Somehow while you're busy listening for that particular sound the rest of the brain gets quiet enough to sleep. My other go-to technique is to find a form of counting that takes some, but not a lot of brain power. Like counting upward by threes or counting backward from 1000.
- 2/17/2012 6:01:34 AM