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I had one friend who had extremely limited display space so he rotated his figures for seasonal displays.
If you're the kind of person who doesn't care about boxes and has stuff with swappable parts, start sorting your smaller pieces into organizers. You can find smaller ones at the dollar store that are good for small bits for stuff like figma, nendo, etc...
Larger stuff I mostly have in bags, but some people buy the bigger organizers with drawers for larger pieces like faceplates.
Make sure you actually label your bins clearly. My parents have a garage FULL of bins and only some are labeled. So it's a guessing game to what's in the others. Label your boxes/bins on at least two sides, so depending on how they're placed, you can always see a label.
Try to separate your stuff a bit better then just all the toys/figs just in bins. Makes it a lot easier to find like, one specific Gundam if you have them with other Gundam/robot/Mecha/etc...
$30 for something like this at Target and you can probably find it cheaper elsewhere.