I actually made a book for cards that I want to keep.
I took 2 heavy duty pieces of chipboard and cut them to just a bit bigger than my largest card.
Then I decorated it with papers and ink and embellies.
Punched 2 holes it the chip and in the cards and put them on a couple of binder rings.
I've only made one so far for Christmas cards (and not every single card is a keeper!), but I want to make a couple more for birthdays anniversaries etc.