I used some clear plastic Window Sheets as the base of these tools. I cut them into the widths that the punch acommodates: 1/2, 3/4, and 1 inch. Then I cut them again out of cardstock and used the end pieces that you would normally throw out. I then taped these pieces to the ends of the clear plastic with Scotch Tape.
Now it's easy to stamp your greeting and place your plastic template over top. Mark the end of the plastic and that is where you will cut each end of your stamped cardstock before putting in the punch.