I've given up on managing my collection.
I have more money than I do time - and I don't mean that as a boast - but what disposable income I do have goes to this damn expensive hobby. Unfortunately I work 50 hrs a week, and attend night classes, so the books (and unopened packages) pile up, unread. I have two 5x8 storage units full of long boxes and trades that are organized with no rhyme or reason. There are also four 2x4 Kallax shelves and two Billy's in my one-room apartment that are overflowing. I've had dreams (nightmares?) about natural disasters relieving me of my collection, which is pretty pathetic! Lol.
But I seriously digress. Good for you for attempting to maintain any semblance of order! I need to adopt a first-in-first-out system or something, but there's just too much good stuff released every week!