I'm really bad at sleeping enough, I also take on a bunch of projects outside of work. To be fair about the latter, though, I only do extra curricular projects that are fun. I'm always doing a band / artwork / writing / programming etc. I generally focus on one thing for about 3 months then switch it up for a bit. I should really get more sleep though.
I still take on many projects, but now I know my limit, and I stay far from it!
Just watch out for sleep deprivation.
I'm currently working two jobs with some extracurriculars on the weekend (mostly fun stuff like crafts). Coupled with a house renovation, future wedding (small, non-stressful), and bad work environments I'm running on an average of 4 hours sleep a day for the past 3 years.
I'm desperately applying for jobs that will be able to give me a 40 hour work week and time to rest, because it's killing me.