When hanging pegboard, you want to make sure that the board is sitting or so away from your wall so that the hooks, pegs, etc. can fit behind the board without damaging your wall. To do so, put 7 washers on our screws to keep the board from the wall.
You can use Air Freshener to clean a dry erase board that just won't erase board. Spray the board and wipe. It also helps "recondition" old dry erase boards. Don't use this method on an ActivBoard or Smart Board in the classroom--only dry erase boards!