First, I bought a pack of cork boards at Jo-Ann Fabrics, for about $5.
What my cabinet looked like before...
I measured the space and cut the cork with scissors. A razor blade probably would have been more effective/neater, but I was lazy and it didn't come out very jagged so it worked well. I was planning on gluing the cork board to the inside of the door in some way, but the package came with these handy adhesive squares that worked just as well and were super easy!
Thanks to the measuring tape, they fit in there perfectly.
Now I have a handy place to store recipes, coupons I need to use soon, and other things that clutter up my desk corner of the kitchen. This is the perfect project for a renter. I can't see the rental company ever having an issue with it, and even if they did, the cork could be easily removed. I might also add some decorative pushpins to jazz it up.
When the door's closed, you can't see a thing! I'd have to say this little project was a success!