This is how I organize my greeting cards. I have tons of cards on display in my craft room, but these are different. These are the card I to send to people. Every time I do a class or join a swap I always seem to have an extra cards leftover so I put it in my card organizer. Now when I need a card for a birthday, anniversary or sympathy, I go right to my card file.
I have the box organized by categories to make it easier.... Female, Male, Mother, Anniversary, etc. I also have a section in the back called "Pieces". This is where I store extra pieces from cards I made. Let's say you need an anniversary card but don't see one you like.. I can go into my pieces file and find a flower left over from a swap. I layer it, put it on card stock, add greeting and WALLA! an Anniversary card.