After hearing a little more about this classic from thedancingj, this morning I bought Bikram's older, blue book. Because I got it while on my way to work, I haven't had a chance to do any more than leaf through it, but already it is hilarious and informative, all in one.
Woke up today well before the 6 a.m. alarm, for the third day in a row. The next time I wake up early, I'm going to practice yoga until it's time to buckle down and get ready for work. I figure that—most of the time, anyway—if I'm waking up naturally, my body has had enough sleep. And if it hasn't, well, I can always sleep on the train down to work.