What's the choice? You don't put them in a box or garbage bag and they will just collect dust or get knocked around in your storage area. I think the best bet is not to store them at all and find a way to display them, in a Mac shelf for instance as art. This of course is not always practical, so you mitigate the effects of storage as much as possible. Long term storage? Put them in boxes, store the heat susceptible components separately in more controlled environment if possible. Or sell the more common ones on eBay knowing full well you can easily replace them one day from eBay when you are in a position to display them and use them. Put the proceeds from eBay in a Mac fund and don't touch it and you'll have even more money to play with later.