I did some very simple accounting and tax work for a small non-profit, and I added one more during the year, and someone asked me to do some work for their organization starting next year. I made no $ at the first place and it's still the case, but I've been able to meet a lot of people so it's been a good networking tool as the non-profit world can be small in certain genres. I would say I cut my teeth in the first place, which has encountered a lot of compliance issues that the other subsequent 2 places haven't. I earn "extra bar $ and student loan $" from the later 2 places, and have also gotten referrals to other small companies - non-profit and for-profit - through these 2.
It's been about the same w/ the for-profit side - I've been helping out a friend, and he's psyched about paying me; he forwarded my name to someone starting a small business. Another friend would like me to do some research for him, which may or may not turn into anything, but will be a good research project.
I only incorporated recently b/c the $ I make is not a lot, but substantial enough to become a personal income tax issue, a worker classification flag, and a professional liability problem. It's been a slow-go that I never thought would amount to anything, but I now have a fair amount of compliance and operations experience for small companies, I'm making some $, I own my own business, and work comes to me more often than me seeking it out.
Couldn't pass again!