I know it's a little bit lame and all been done before, but every kitchen needs a good chalk board. Especially a renter-friendly one. It's amazing what you can achieve with a chisel and some angle brackets if you want to attach something without doing any damage to precious surfaces.
Making the chalkboard - chiseling, attaching brackets, priming, blackboard painting
The chalkboard hangs nice and flush with the wall, and to secure it at the bottom we just used a couple of 3M strips to hold it in place. Easy stuff.
Chalkboard calendar - renter friendly :)
I'd love to paint an entire wall in blackboard paint, but this will have to do :)