cork tiles! They make AWESOME and stylish bulletin boards. I cover each one tightly with pretty fabric first, then we use them for leaving messages and reminders. One by the front door (for reminders on the way out of the house, like "Don't forget to take the dog out!", plus had a hook underneath for the doggy's leash), one in the kitchen for bills and recipes and shopping lists, and on bedroom doors for photos, notes, etc. (kind of like they're used in dorms).
I've made my own full-size fabric-covered cork boards too. Really really quick project, and looks much more fun than plain cork.
eta: got mine from Target too