What do you do with all the spares?

The query here, is how do you arrange all of your spares and other random items? And then, what do you do, if you think you're hitting that point where you won't need them any more? So, but of background; I've had lots of different cars, and tinkered with lots of cars over the last 18 odd years. In addition, I have a habit of ending up with things, I'll now never need again. For example, for the R33, I've got a side mount intercooler, and a GTR front mount cooler, as well as random items like aftermarket cam gears, starter motors, power steering pumps, and even things as random as the really small fuse box, that sits right beside the battery. So firstly, I've got a lot of stuff right there, that I'll never need again, as I'm not playing street/stock cars. So, I probably need to clear some items out, and at the same time, I hate Facebook Market place and dealing with people. So other than throwing this stuff out, how do you guys deal with it? Do you have a similar stash of parts hidden away taking up space? So then the next part is, I have lots of stuff like aluminium pipe to make inlets from, lots and lots of electrical stuff too for making custom wiring looms, and so many random things. How do you guys organise all of your stuff? I've moved a lot, and lots of my stuff was just in random cardboard and plastic boxes, that were starting to fall apart! Lots of it was stacked on shelves in said boxes, and I've just gotten new shelving, and I'm re arranging the garage to fit some new (to me) large tools in. That means I'm presently opening boxes, being ruthless and ditching the trash (I think about 30 cables that would suit a TV/Desktop PC went in the bin alone!). However, now I've got parts laying in the middle of the garage floor while I work out how to store them on shelves. The shelves are all high, so if I lay all the parts out nicely on shelving, I lose heaps of space. But if I shove them all back in boxes, I'm back to square one! So what mysterious and creative storage solutions have you come up with? That is other than making the garage bigger, and buying more shelving, and pushing this problem back another 5 to 10 years... Oh, and lots of things I have, are for projects I want to do one day, or am slowly doing too... The 80HDs can make life hard sometimes... So more storage space probably isn't the best idea... Let's add another random question too, how much space is being taken up in your workshop/garage from parts you bought years ago, and still haven't fitted? Example, I have a brand new Safari Snorkel for the LandCruiser, and a box of RedArc gauges. Since November of 2016...