www.sugarloafcrafts.com/Crafts-Fair Become an Exhibitor at Our 2014 Art Shows in 5 Great Markets.
www.zazzle.com/sell Sell your artwork on hundreds of retail-quality products!
www.mmefineart.com/ 19th & early 20th Century American Gallery buys American paintings.
www.shop411.com/Sell+Original+Art 100+ Sell Original Art From $9 Hurry, Sales May End Soon!
How I did it: I found a client, designed a piece, painted it, and mailed it off to California. Kinda sad to see it go so far away and I'll probably never see it again, but that's the life of an artist, right?
www.liberty412.etsy.com (not much there at present, but more coming Spring 2010!)
Lessons & tips: Just do it. Art is subjective, and eventually you will find the person whose taste coincides with yours.