The documentary about South Park studios production process "6 days to air" is pretty great

I watch it regularly to not forget how to give everything you can in a short time span and still enjoy what you're doing

I learned to work 6 months/year and make a full year salary

I've been working at a more reasonable pace for the past few years, mostly because I'm not consulting anymore, but sprints have become more of a challenge that I still enjoy once or twice a year.