I had to wake up at 5 AM today and feel much better, probably because I had 1.5 hours to myself. I knew that I could sleep in and wake up at 6.30, but I would feel like crap.

Usually, when I'm free, I like to go to sleep at about 5 AM (which was a bitch today since I had to wake up at the time when I usually go to sleep). Wake up at around 3 PM. The most creative time for me is after midnight.

I used to work in the US. With the time difference, I went to sleep there at midnight (which was still 5 AM where I'm from). It was the only time when I was able to fall asleep without any problems. The time zone was adjusted perfectly for me. Nobody was bitching about me being lazy and sleeping until the afternoon either.