Long ago, I attached shelves to the walls in the hobby room. I have the stash of kits grouped by manufacturer, such as AMC, Dodge, Ford, Buick, etc. Within those groups are sections of sub-groups, like Chargers, Mustangs, Corvettes, Impalas, Ford pickups, and so on. Helps me keep it straight in my own head! LoL I have all of them listed on spreadsheets on the computer, in case something bad happens.