The first thing I added was a guard for the door latch sticking out. I caught and tore a jacket on it. The guard is merely a triangular shaped piece of 2x4 to prevent things form catching on the latch.
We leave rear table down for sleeping, removed the leg, and use space underneath for clothing tubs.
Have shelves in closet for dishes, appliances, etc. also shelves where refrigerator would have gone for shoes and exterior items.
Raised and added slide to the front table.
Added a coat hanger to the right of the door.
Added a brace to the end of the "U" shelf next to the door.
Added a paper towel holder to the right of the galley under the forward "U" shelf.
Found small plastic baskets perfect for holding different things in the "U" shelves, in a dollar store.
Use suction cup hooks in various places. We are replacing the suction cup hooks with stick-on type.