I sell most of my work. I only do custom jobs for people; no mass production. I use
www.vistaprint.com/ and get all kinds of free stuff, from business cards, post cards, car door maginets, hats, shirts, and pens to start. Every time I make a sale, I offer the "refer-a-friend" line, and offer a discount or cash to them. I attach my cards to everything I make, even if it is a gift for a friend.
I am lucky being around a military base with a high turnover of people. Sales can be awosome or totally suck. Neither last too long.
I have a good website that I use mainly for showing people what I do. The line, "...well I just kinda burn a picture onto wood..." doesn't sound all that cool. People have to see it. The "...worth a thousand words" thing applies. Check out my site to see what I mean.
www.projectwoodworks.com/
I am also careful who I market to. I am with Dave. It sucks trying to sell something if the potential buyer is a moron. Sorry to say it but, alot of people don't know what goes into these projects. I am not Walmart, so don't expect to pay Walmart prices. I actually doubled my prices a while back and sales also doubled. Go figure.
I do alot of word of mouth and keep up with events around the area. If a new high-ranking guy shows up, for example, I try to make him something. No charge. Just a congrats, and here is my card. The rest just falls into place.
I read somewhere: ABM. Always Be Marketing.
Good luck.