For about 6 months during high school I would take a 1.5 hour nap after dinner from about 7:30pm until 9:00pm then sleep again from either 2:00am or 3:30am unti

For about 6 months during high school I would take a 1.5 hour nap after dinner from about 7:30pm until 9:00pm then sleep again from either 2:00am or 3:30am until 6:30am when I had to wake up (multiples of 90 minutes). With 4.5 or 6 hours of sleep per night, I had more energy during the day than I ever have since sleeping 7-10 hours. I stopped because I was waking my parents at night and since then I haven't been able to work it back into my schedule. Some caveats: (1) I needed somebody to call me to wake me up at 9:00 (I used my long-distance girlfriend for this – it was a good excuse to talk anyway). If I didn't have somebody to wake me up, I would often sleep through my alarm and wake up at 6:00am. Sometimes I found my alarm clock and/or bedside lamp on the floor. (2) My state of mind after the early evening nap was very much unlike normal waking experience. There was a sense of unbreakable tranquility and bodily calmness, as if a thin membrane had been stretched over experience and time had stopped. I read somewhere that certain writers are known to have induced this state for the purpose of doing their work. I blogged my experience at the time, but it appears that the blog is now gone and I don't have an archive to my knowledge: <http://alternatesleep.blogspot.com/> http://alternatesleep.blogspot.com/>. You may be interested to read this person's log: http://polyphasic.blogspot.com/ http://polyphasic.blogspot.com/ – my experience was similar to his.