If you are in a hurry and need quick cards the last minute, here is one that has been inspired by Macy's mailings. Clean and Simple with a pop-up belt and embossing greeting and you're good to go.
If time permits, try creating this Santa Snow Globe card. It was pretty simple too with the Jolliest Time of the Year stamp set.
A little glitter, glimmer paper, and gold embossing and it becomes cute, cute, cute!
Ho!Ho!Ho! I wish I have that stamp for the first card! :)