I have found greater success when I have prepared carefully for the binding. First of all, the corners must be trimmed straight-right angles measured with a square ruler. Then when I sew on the binding I measure as I come into the corner. At 1/4 inch I pivot the machine and stitch off at a 45 degree angle. Take it out of the machine. Fold the binding strip up straight (180 degrees) fold it down onto the quilt. The fold must be even with the edge of the quilt. Start stitching at the edge of the quilt and continue to the next corner. Then, I press the b inding away from the quilt and make sure to press into the corners. Turn the binding and stitch down. I find the corners miter easily because of that understitching at 45 degrees. I do this method whether I stitch the binding on the back and finish to the front by machine or stitch the binding on the front and hand stitch to finish on the back.