The first thing that popped into my mind is “what is wrong with you?” Not to get too heavy about it, but in my experience, people who want to do this kind of thing are running from something deep inside. Usually some kind of demon or another. They escape into constant work and constant upness so they never have to face the demon.
You can keep that up for a while, but not forever. Eventually the demon catches you, but, instead of being a pitbull demon, it’s now a raging boar demon.
But you didn’t ask for a warning. The way you do this is that you shut out all other thoughts. You never stop. Work, work work. Don’t let yourself feel tired. Remember, if you stop, there’s that demon to face, and you gotta keep running. Just remember the demon. He is huge and ferocious and if you stop being up for one second, he’ll get you.