Open the top of your cardboard box and cut off the top flaps with a utility knife. Discard or recycle the flaps; you don't need them.
Slice down through the right and left corners at the front of the box. It doesn't matter which side is the proper "front," just slice through the corners of the side facing you.
Turn the box backward so the bottom of the box is now the front. Again, slice down through the corners at the front of the box. Flatten the sliced box into a large T-shape.
Cut the flaps, or "arms," at the top of the T down to about 1 inch wide. Discard the excess cardboard.
Cut two 1/2-inch wide, 1/2-inch deep notches in the center of each 1-inch wide flap. Bend them upward so the notches point toward the ceiling.
Grip the cardboard at the bottom of the T and fold it backward into a triangle. Slip the edge of the bottom of the cardboard into the 1/2-inch notches. You should have an upright triangle shape with a flat, angled side facing toward you.
Glue two spring loaded clothespins to the top of the flat side facing toward you. These clothespins will hold your work, or a lightweight book, in place. Let the glue dry for about 10 minutes before use.
