Here are some great ideas I found on Pinterest.
What are you going to do with all of the holiday cards you received?
A wreath. The holly leaves are made from Christmas Cards. Originally from Good Housekeeping.
|Good Housekeeping How To|
Ornaments made with lids. They suggest canning lids, but I think this could be easily adapted to any lids. Originally from Better Homes and Gardens.
|BHG How To|
Monogram gift tags. I love these. They really dress up a gift. Originally from Martha Stewart.
|Martha Stewart How To|
Triangle gift boxes. These are so cute and practical. Originally from make homemade gifts.com
Cube box. As shown it can be opened and have a gift inside, but I like the idea of a closed cube also. It reminds me of the photo cubes you can buy. Originally from Crafts@suite 101.
There are a lot more ideas of things you can make with Christmas cards on Pinterest. I have a Uses for old Christmas Cards board that you can see at http://pinterest.com/jennifercro/uses-for-old-christmas-cards/ if you would like to see more ideas. There are so many here that I would like to make. I hope I get TONS of Christmas cards.