This video from UNC-Chapel Hill reveals a neat-o way to store fragile pamphlets upright on a book shelf. If you want to get fancy, you can scan the original cover and attach a printout to your new cover. You can even add an edge label so you will know the title without opening anything up. Why should you bother?
With this system, the pamphlet lives in a custom envelope, so it stays dust free. Why is it important to keep dust away? My years as an archivist and my former career in a used book store showed me that if you wait long enough? Dust turns into gritty dirt. And not only is dirt is more difficult to clean — the grit can scratch and permanently damage your treasures as you attempt to clean it. D’oh!
Dust = Dirt = Damage
Another advantage of this system is that it protects ephemeral items from UV rays.
Light = Damage