he slept 4 hours a night on average

when at Paisley Park he tried to record a new song a day (!) He'd have a song fully done in the early hours of the morning

on tour he had every concert taped. right after a concert he made the other band members watch the whole show with him on a big screen to show them what went wrong, where things could be improved and what worked well. the show would be changed accordingly. EVERY. SINGLE. NIGHT.