Steve Pavlina is experimenting with Polyphasic sleeping. It's a method of sleeping 6 times a day for about 20 minutes. Theoretically, you go right into REM sleep. Supposedly, one of the famous Renaissance artists used it. ...I read vigorous debates on training techniques of famous runners, on a running site, with multiple sides, and have even seen the actual runner himself shouted down, so I'm skeptical anyone would know what Michaelangelo did...
It's a fascinating read, as Steve is trying to cope with the effects...