An incredibly easy bookmark.
(I didn't invent this but the technique is my own. Refine it as you will.)
Step 1: Materials
For this bookmark you will need:
Paper or Index Cards
Duck Tape of your choice
Step 2: Shaping Your Bookmark.
Cut the index card in half or however you'd like. Experiment with different shapes if it floats your boat.
Step 3: Adding the Tape
Put the tape down and place your paper of choice on it without making creases...unless that's the effect you're going for. Be creative.
Step 4: Trim the Edges
Trim the excess tape from the ends.
Step 5: Repeat Steps 3 and 4
Cover the other side with tape and trim the edges.
Step 6: Enjoy Your New Bookmark!
You did it. It's a pretty awesome bookmark. Enjoy!