Pat: Luckily my filing cabinet is stored in a closet. Otherwise, I would do something like this!
There are a lot of ideas on Pinterest and Hometalk for painting filing cabinets. You could have a lot of fun with chalkboard paint on the sides, just an idea.
Here are several Hometalk projects on the subject. Maybe one of them will work for you.
I would paint them with chalkboard paint so you can label everything easily on the outside. And erase it every time!
Wow! Thanks everyone for the great ideas!