A quick scrap-block squaring system
Starting with a piece of 3⁄4 " hardwood about 3" wide and 6" long, I centered a 3⁄8 "-deep kerf down the length of the piece to snugly fit the legs of my small framing square. Then I crosscut the blank in half.
To use the supports, I simply fit the blocks on the square, where shown, and clamp them to the two pieces being assembled. This setup frees my hands, too.
—Gregory Hampton, Shoals, Ind.