Plumbing foam pipe insulation (hardware store), preferably the self-sealing variety, but if not that's OK too.
Duct Tape (I didn't need it, but it could come in handy.)
Step 1: Cut the foam pipe insulation
Figure out how long you want to cut your pipe. I wanted to make protective corners and then added pieces to go between the corners to cover the length of my coffee table. Suit yourself, it is pretty simple.
Next cut a V shape out of the middle of each corner, one on either side of the pipe. Be careful to leave space between these Vs to wrap around the corner. In other words, don't wind up cutting your pipe in half by mistake.