I know the best way to make money at art is by selling prints, but I haven't found a very economical way to do it. I'm unemployed, so I can't invest much in it.
I have prints of some of my things on CafePress, and the quality is really good, plus I don't have to invest anything. I also don't have to deal with the shipping. On the down side, even if you buy it through my CP shop I only get 1/3 of the money, and if you buy it through the marketplace, I only get 15% of 1/3 of the money. It's ridiculous.
I looked into getting my paintings professionally scanned and printed but the cost would be more than the paintings are even worth!