Here is another instructable where something unique appears from a little scrap wood!! This 5 min project (Please take your time when working with POWER tools, its not worth your limbs!) didnt cost me a cent!!! Sweet. Enjoy.
Find a small piece of wood with a natural edge. I like pine because its plentiful and cleans up nice. From the natural edge, come up about an inch or so and mark a 45 deg line. Then flip the square and mark other line.