A couple that I did on the side:
Had about 30 MLMs going for a bit in the late 80's. Got a decent chunk of change from that
Had some 900 numbers in the early 90's
Adult was the first full time biz I've had and now I'm focusing on real estate with medical coding to fall back on.
Worked for others doing a lot of different things but these are things I've done on my own.