Too bad i've never been able to get used to these "more-than-monophasic" sleeping schedules because there is so much noise around, either people on my house speaking or my neighbours f**king dog making noise all day long, i will kill it someday, i mean it.
So i just do the monophasic schedule like steve does, i have no time to go to sleep but i do have a fixed time to wake up, which is at 8 am, its when the noises all around start, so if i dont wake up with my alarm clock, the noises make sure i dont oversleep. Gotta use these noises for something useful