well usually i only keep ores, bricks, and some basic stuff like maple, leaves, clay, stone etc… The decorations items i just give them to somebody else or I just create a new world to get rid of them if i don’t have too many.
I have a suggestion (totally crazy but who cares) : What if we create a “mine” world and then make some “slots”. When we need more we just need to dig deeper and deeper. What do you think ?