So many projects, so little time, how do you balance?

While working a fulltime job I quickly realized working on multiple serious side projects at the same time was craziness (and incredibly unhealthy, as I was sitting for 8+ hours a day already at my main job). So I saved up a bunch of money, quit my job and switched to 3 days freelance per week + 3 days working on own projects + 1 day doing nothing.

Even though I have to find freelance clients, do invoicing, taxes,... I find it much more rewarding and feel better overall. There is no dreadful feeling of coming home and feeling guilty because you're too tired to work on your side projects.