Side jobs and supplemental income, what do you do?

[Alexxx]

We have a "what do you do for a living" thread, but what do you do, besides what you do?
I'm looking to start making some hobby income. I have a cushy desk job and I need some more fulfillment. Not hurting for money or anything, but just want to "work for myself" a little on the side.
Anyone here share that mentality? Who here makes money on the side, and how do you do it?