I own a few negatives including some glass ones. I store them individually in glassine envelopes which I then store them together in acid free photo envelopes. And then they go in an archival (acid free) box.
Do not store glass negatives horizontally.
I have not had any prints of my negatives made yet. I would like to send them away to be processed the old fashioned way (non digital), but haven't really found a place to do that yet. I will probably purchase a scanner like the Epson v700 in the future. Just can bring myself to spend the $.
I've listed links to some of the storage stuff I use.
http://www.adorama.com/FSGE2350S.html
http://www.amazon.com/Acid-Free-Lign.../dp/B001THPMWO
http://www.adorama.com/FSBN45.html