I came up with a great and inexpensive advertising idea for my Etsy shops... homemade business cards! I started out with colorful index cards, an index card holder, markers/pens/ or even printer sticker labels, and scrapbook stickers. I color-cordinated cards and stickers, and then I wrote my shops and blog on the index cards. Cheap, simple, and colorful. You can mix it up and get as creative and technical as you want. Have fun!!