How can I preserve opened Lego packages? For some reason I keep my old Lego boxes (since the 1980s), and my son's old Lego packages. Because they are quite large, they take up a lot of space in my house, even if they are put one into another. I suppose I am not the only one (see this comment) who keeps them.

I actually don't know why I store them &mdash; maybe some psychological issue &mdash; but how can I effectively store old packages? And those of you who keep old boxes, do you ever display them, or browse them? Or do you just keep them?
Well I used to keep mine as well. One thing I found very good was to take a razor or a box cutter and cut the front and backs off! this may seem obvious or defeat the purpose, but it made them easier to store. I would stack them all and slip them on a shelf or under my bed to keep them flat. This proved to be a very effective solution. Also, you could try to collapse them at the ends to have them take up less room as well.