I'm actually officially on segmented sleep now so I sleep 3 hours right when I get home from work (sometime between 6-9pm) and again from 3:00am-7:30am. If I work 9am-7pm, I sleep 8pm-11pm or so, force myself out of bed on the first alarm, and go to the gym or run on the beach. 30 minutes later, I'm awake, alive, and can do freelance / hubski / read...or get shitfaced...or both between 11pm and 3am. If I didn't go to first bed until 9 or 10pm, I usually only do a 2 hour nap instead of full sleep there and skip my workout to maximize productive time. I hate that though because I usually end up losing 30-45 minutes in wake up mode, even without my workout. Hardest part was developing the wake up on first alarm habit. I've got it nailed for first sleep but still snooze 3-5 times at 8am. It's a process. I'm WAY more productive now though. It's amazing.