I had an open wall and a sheet of cheap 3/4inch plywood sitting around so I made a French cleat wall.
If you are not familiar with the system, the slats on the wall have the top edge cut at a 45 degree angle and the shelving/storage items have an opposite angle so they slide right into the grooves.
More pics of my messy shop
Neat! This was ...laser cut? Extra neat. That's pretty thick for the (minimal) laser cutting I've seen. Good job.
No! I should have clarified, its just my same shop and I store some of my laser cutting supplies here.