Fun Cards using a Circle Punch

Do you have some of those circle punches?  The one I have is made by Fiskars.  I enjoyed using it to make mats for photos for scrapbooking, but then one day I had a bright idea.  I didn't have to punch a whole circle, I could punch half of one -- then I could use my punch for card making!  Here are some examples of cards I made using this technique.

The basic technique is pretty simple (though implementation can be a bit tricky).  Use your circle template and line it up on your card with one edge at the edge of your card front, and the center of the circle (where the template folds in half) lining up somewhere around the middle of your card front.  Then, punch through the card following this half-circle shape.  You can back the card front with a coordinating paper or cardstock if you wish.