Wow, it's crazy the diversity of professions we all have.
I do several things to make my money that I inevitably dump back into my tanks. My main source of income is teaching music, more specifically percussion and drums. I am the percussion instructor at Monarch high school in Louisville and Awest high school in Arvada. At the high schools I mainly deal with marching percussion, I.e. marching band and winter drumline. I also teach private lessons, some rudimental percussion, but mostly drum set. I have built a small recording studio on my parents property (lionsgate event center) which I use for my own recording/private lesson purposes, but also rent out for budget recording projects. This side business hasn't taken off much yet, since I haven't advertised at all. On top of all that, I am a semi-pro photographer and will take the random photography gig if and when it pops up, mostly back up shooter gigs for weddings.