Two items we had to add to our RV that we had in the previous are a shelf over the door and hooks for coats and jackets.
The shelf over the door is very handy for placing small items like a flashlight, leash for the pup, and possibly keys. It is only 27" x 4", but man is it handy. Just one board, 4" x 27.5" x 0.5", a trim piece on the front, and some rubberized shelf liner to prevent rattles while travelling.
We like to travel in cool weather. The hooks provide an easy location to store our jackets and coats. It keeps them from piling up on the Euro chair.
JJ