Inside of laundry doors
DIY Backyard Fire Pit with Swing Seats. Can do smaller version, for smaller yards.
Mechi Love the island Wheels
Kitchen or anywhere DIY. Seems simple enough, depending on your gap between shelves, anywhere from ropes to ropes for your spacing. You could even use wider wood, just adjust your rope length to accommodate your width and height of your shelves.
You can transform wood pallets into useful household items, living room or patio furniture and decorations. Get some creative DIY pallet furniture ideas