Break out an X-acto knife and go to town. Use the printout to cut the design out of one half of a piece of paper.
These were cut on our 75 watt Epilog laser cutter. For all you laser geeks out there, I cut a line on the middle of the inside of the card at 100/4 to score it for the fold and the card was cut at 100/30.
Fold it over and you have a card. Glue a piece of white paper on the inside and you have a backdrop for the cut-out design and a place to write more sweet messages.