How do you catalogue your collection?

[Kirchgoens]

I use a very long Excel spreadsheet with fields for type, s/n, price paid, date bought, who bought from, if researched, posted to SNDB, weight, comments, etc. It's very long now, but it has become an essential tool to keep track of what I have. I make myself fill it out completely each time I add something to the collection.

Brendan - what medals software are you using?