These are my Singapore polytechnic and secondary school notes all stored in a box. Every alternate year I’ll add more things into this box. And when the box can’t contain more things, I start dumping the really old things.
Sort of force myself to keep things within the limits of the box size. My disposal policy goes like this: If it’s something I am not going to use or look at in the next five years, it probably should end up in the bin.
(I still keep one stack of secondary school stuff because they’re my English compositions. I sucked at them but that’s precisely why I keep them – to laugh at myself.)