I've made some promotional bookmarks. I thought they'd be a nice gift to send with customer orders, and freebie giveaway for people who buy up big at the markets :)
It has my shop logo and tag line on the front, and logo + web address & email on the back.
This backing is also what I put on all the photo bookmarks I sell in my Etsy shop, so that people can find me easily for repeat orders. The front and back are a lab printed photograph that I have cut down, sandwiched together and laminated.