MP, Facebook has been by far the best marketing tool for me. It's nice because if your client is on facebook too, you can tag them in the image and then all of their friends will see it. My of my friends from high school/college wouldn't know I do taxidermy if it wasn't for FB. People can see your quality, get ideas of their own for their mount, etc. This free marketing tool has brought me more business since I started the page than word of mouth and passing out business cards.