(Image credit: Apartment Therapy )
Here's an interesting idea from Martha Stewart Living: a Chalkboard Paint Wall Calendar.

We like the look of the different shades of chalkboard paint. A little too much work for us to DIY, but perhaps for you more crafty types?

Instructions are here.

Add this to the AT file of chalkboard paint ideas, which includes Chalkboard Paint on a Kitchen Wall and Chalkboard Fridge.