I tried to do a search on this, but it is not working, so I'll start this topic. Interested in people's opinions and advice on the long term care of your RPG materials.

I have all of mine in plastic magazine sheaths. Not zip locked sealed though, just a flap, which makes me wonder if I should get zip lock seal bags for the best protection. After that all are stored upright in boxes, as seen in comic book shops.

Nice thing is I live in San Diego, which means very dry and cool conditions through the year. Possibility for bugs however.