There are a variety of card organizers out there. Anyone could create their own if they wanted very easily. I purchased mine on clearance somewhere and sometime, in this lifetime. This particular one has a floral design with storage on top and a drawer in the bottom for decals and stamps. (Stamps for those people who actually purchase the cards to send.)
There are dividers/folders inside for each month. The dividers in the back are organized according to events, like Thank You and Congratulations, In Sympathy, Weddings, Anniversaries, and Birthdays.
I made sure every card that I kept had a matching envelope and tossed (yes) the ones that didn't have a match.
In an effort to keep this Resolution - (Remember Important Dates and Events), I called a few family members to double check dates and to write them down on the folder of the month.
I updated a few addresses since a few have relocated to new residences since I last sent a card. Or made the effort...