I organized all my short boards by turning an inexpensive 6-ft. stepladder (about $30 at a home center) into a lumber rack. Now every board is easy to see and reach.
My ladder didn’t have treads on the back legs, so I screwed on wooden cleats that align with the treads on the front.
I connected the cleats and treads by screwing 1/4-in. plywood shelves on top. The shelves make boards slide easily. I can store boards as long as 7 ft. on the bottom shelf. Fully loaded, my ladder lumber rack holds about 20 bd. ft. of lumber.