Answering some of the questions from above:
Been doing if for about a year. Started biphasic (3 + 1,5 hours), went polyphasic for 2 weeks (no fun if you have a family and enjoy being with them). Ended up with current schedule which I have maintained for about 8 months (except for a month long holiday where I was monophasic like everybody else).
Totally agree with SuperStar's girlfriend... it's a question of attitude. If I tell myself I'm tired, then I really am tired. So I usually tell myself that I'm totally fresh and ready for anything
I work on my own business in the morning before going to my normal fulltime job. My plan is to live on my business within a year or so, so I'm very motivated in the morning hours. I don't think I could pull it off if I weren't motivated.