I wake up and work until I go to sleep. Every day. 8 hours of sleep, either in one chunk or in two (biphasic). I feel better with biphasic. So that leaves 13 hours each day after subtracting eating time, housekeeping, bathroom "tasks", reddit/HN, and falling asleep transition time. 91 hours per week. Been living like this for years without burnout, although I think at 100-130 hours one is asking for trouble.