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Originally Posted by andrew  See, my biggest problem is that falling asleep for me is such a huge variable. Anywhere from 20-80 minutes, depending on how tired I am. So setting my alarmclock for 90 minutes etc is really hard. Do any of you use your internal clock? |
Personally, if I don't feel I could fall asleep within 10-15 minutes, I don't even try. This means I can always set the alarm for around 100 minutes (for a nap), knowing I'll be awake at the right time.
David's advice about getting back up and moving around is good. If you just can't get to sleep, there isn't much point in simply lying there. Get up and start doing something, and you'll often find you become tired shortly after.
As for using the internal clock, yes and no. I've always got a pretty good idea of what time it is, and if I tell myself to 'wake up at 5:00' for example I'll come pretty close. However, I still set the alarm each time - just in case.