I was wondering this too... thanks Jeff, that's like what C911 told me, about switching positions, but I didn't know the trick about the light.
This should help me revise my failed WBTB last night .
If you had a very quiet alarm clock that you set for, say, 6:15 hours into your sleep, do you think that you could recognize the sound in your dream and become lucid, or would your dream make up a stupid excuse? My guess is the latter from my experiences.