Next, fold it like accordian style.
Now, fold it in half to find the middle (around 3" mark) and staple
Take your scissors and start cutting about 1/2" from the staple, up to the ends (not on the folded side)
Then put a little piece of sticky strip above the staple on both sides (placement of the sticky strip is important)
Now fold the accordian out, so that the sticky strips hold it together