Greg,
I store mine 3 ways.
1) In frames on wall.
2) Mylar bags. Specifically I use Mylites4 comic bags. It's 4mil thick and offers archival level storage protection. Here is a link I found on ebay, but a lot of times I'll buy them at the local comic book store. They come in multiple different sizes
http://www.ebay.com/itm/Mylites-4-Ma...AAAOSwbsBXnUdU
3) Art portfolio display book. Itoya and others make various sizes and quality levels.
Despite that, I think true archival storage is considered to be laying flat in a photo box with archival paper in between each photo.
Hope that helps.
Mark