My personal experience is somewhat analogous to yours. As someone who's working full-time and doing part-time graduate school, I have to ensure that I get at le

My personal experience is somewhat analogous to yours. As someone who's working full-time and doing part-time graduate school, I have to ensure that I get at least 8-10 hours of sleep daily to stay sharp throughout the day (haven't quite figured out the whole nap thing yet). It also really helps if you do something like lifting 2-3 days a week so that you're able to endure these 60-80 hour weeks better. I'd say the big advantage of 5am is that nobody's there to bother you, but you could probably pull off the same 2 hours of personal work / day if you were to work after 6pm.