I clicked on the book and it didnt describe what personal rhythm theory was and the link to the other site didnt really describe it. Is it like a sleeping schedule? I used to have terrible insomnia and take sleeping medicine which wasnt good for my memory or alcoholism. I read about sleep training and did it myself and even though it took a good 6 months its so easy for me now. I basically wake up in the same window of time and go to bed in the same window of time every day no matter what. For me that means waking up between 4a-6a and going to bed between 10p-12a. I had to use alarm clocks to get into the routine but now its like I almost wake up naturally. There were other things I do but the biggie was the sleep/wake schedule. I had to be very rigid and persistent but it really paid off. Is that what this is about?