Last year I saved some of the cute holiday cards we received to use as gift tags this year. I try to reuse items whenever I can and thought they would come in handy. I was able to use them to adorn plain gift bags and to create hanging tags.
I think this idea could go for any kind of card you receive, you just need a place to store and organize them. There are so many cute thank you cards I receive that have pretty floral patterns or just the word "thank you" on the front. They would be great tags for birthday presents, hostess gifts and much more.
I can't wait to see what cards we get this year that I can work with!