Ideas for what to do with contact paper?

Decoupage them to a cardboard box. Or buy some plaques and cut to size and decoupage the pieces to the plaques.

Here are some great ideas to get you inspired! https://grillo-designs.com/decorate-rental-with-contact-paper/

Here's a few links to get your creativity going again.

I like to repurpose boxes for organizing my drawers, cutting them to size and then covering them with contact paper.

I use them to cover boxes for storing things, if it goes with the décor you can even cover things and leave them out. I am going to make holders for magazines and cover them in contact paper, rather than buying the metal or the flimsy ones you put together. I also covered a box to put on the shelf in the bathroom for hubbies meds (get three months supply by mail), it is not assessable by the grandkids unless they can pull the shelving unit out of the little space it is in(sideways), between the linen closet and the vanity, it is very tight fit.

I use most of mine to repurpose boxes for storing items.