Let's be honest: a bare wall can be a real challenge to decorate. Framed photos and artwork are typical, but for something different, these slim display shelves will do the trick. And for about $25, they're worth a try. These unique space-fillers can fit any decor style. Just stain in the color of your choice and fill them with your favorite postcards. Ready to take that wall from blank to beautiful? Keep reading for the how-to.