Tools and parts for projects conceived, but never having the time or complete logistics to complete.
Spare stores for the disaster one might have - air, food, water, ration bars, batteries, etc. (a touch of 'Prepper'). I guess if I was USAian, I would have thought immediately of ammo. And if I wore a Brown Coat and a Cunning Hat, I'd add grenades (because I like to keep my options open).
Runs of Tri-D series I got to see a few episodes of when I was younger, but never got to see all of and want to watch all the way through to get the whole story and because of the nostalgia.
Books. On every subject. And then more books. Tangible books. History. Languages. Software. Politics. Philosophy. Design. Architecture. Woodworking. Survival. Butchery. Cooking of all sorts. Baking. Distilling. Log Houses. Fantasy World Building. Papercrafts. Model building and resin casting. Surgery.
Things that I didn't throw out because even though I didn't know on what, I knew they could be used in a later project to build something and I am green enough not to want to waste salvagable materials - metal tubing, metal pipe, metal plate, lumber, chunks of marble, plastic moulds, plywood, insulation sheets, etc. In a ship context, spare hull panel pieces, spare insulation leftovers, spare wiring from runs that were only partly damaged, spare components like switches and suchlike, power supplies for devices that have died, every form of memory card back to TL-8....
TomB