**just my opinions and what I've thought out to stimulate more conversation**
This is something I've been trying to figure out as well and come to similar extenuating ideas; just do great art and have a killer portfolio.
-and though I'm in the same boat (not being a professional) I thought I'd share kinda what Ive come across and see what you guys think. -I'm working hard to become so. The first kinda idea that I had was to create passive income generators, money you make with little effort. This looks like merch on a website or royalties of some kind whenever your work is used, say for a t shirt design. Bruce Lee-ing my personal finance; "most amount of output for the least amount of energy."
A lot of the money I've made has been doing portraits or landscape-murals because what I think is because of a face-to-face holistic interaction, plus most of the work I have is what I'd consider study paintings. I think a lot of us consider a job as commercial freelancers when there's other artistic opportunities out there for $$ where you don't have bag groceries, make coffee, or do landscaping for 8 hours a day. (which I all do-lol)
On making a killer portfolio,
My day jobs are all orbiting my desire to get better as an artist. That means I've chosen to work the least amount of hours possible (covering rent and food) to make to most amount of time for studying. This means not going home and blowing hours on video games or hanging out with friends, but hitting those books and tablet hard. Some of those jobs even helped me to get my name out there, putting art in coffee shops, networking where people asked to see my stuff, having a gallery showing during a posh wine and cheese party on a house boat, ect. Plugging into various painting groups and communities online (The Guardians) and around town (Figure drawing sessions) really helped for full immersion as well and getting that name out there, but if you don't have multiple accounts on art networking websites I'd make it happen.
Anyhoo, for whatever that's worth; hope it helps somebody! Here's some online shtuff! :]
http://cghub.com/jobs/
http://jobs.conceptart.org/
http://www.threadless.com/
http://www.rvca.com/s/anp
applying in other cities and telecommuting:
http://craigslist.org/
-knowing what studios are out there:
http://www.gamedevmap.com/
-lemme know what you guys think!