I find it interesting that so many of you seem to be advocates of the 20 minute nap thing. I have always heard that because you dont reach your REM sleep until after (what like 90 minutes?) it is almost pointless to take a short nap. However, after hearing all of you promoting it, i will have to try it... i will have to use extreme caution though, because i can be a very, VERY deep sleeper, and in my field of work, that can equal disaster. Ill just have to try it with really loud alarms.