Get yourself a cheap spiral-bound notebook, and cover it with pretty paper.
Now glue or tape the FRONT of an envelope to the inside BACK cover of the notebook, like so.
VOILA. You have yourself a Christmas organiser.
Use the notebook for lists, gift ideas etc, and store all your receipts in the envelope in case anything needs to be returned.
I made myself this one in a hurry about 5 years ago, so it's functional rather than pretty, but they also make a nice little gift idea, especially if you take a little care and use a pretty envelope etc.