On our 24FBS, the couch is right beside one of the outside walls, and there's no space there to put a drink or the remote when we're spending time inside the trailer. We had been using a small collapsible table for convenience, but it took up a lot of space, so I decided to build something to solve this problem.
This is made out of 1/2" MDF, with 1/8" hardboard on the back. It's 11" wide by 6" deep by 24" high, just big enough to be useful but small enough that it's not in the way. It's the perfect place to put a drink or remote, or a book and glasses for those Saturday afternoon naps. I still have to paint it and it will eventually be attached to the wall with velcro strips. I made sure it doesn't interfere with the slide at all.
Cross another one off the list.