These are the images I'm using on my Christmas cards this year. I either scanned the images or found them on Tumblr.
I usually open them in a word document with the margins widened and two columns set. I line up the picture on the right hand side and usually fit two on one page. Once they're printed I use a guillotine to slice them to the right size and add some glitter and sequins.
Last year I printed my images onto photo paper and cut the pictures out and stuck them onto card, this years method is far neater and easier, although I quite miss the glossy-ness of the photo paper!