When I am doing a block where there will be a triangle of fabric cut off...after I have sewn on the drawn line...I go over about 1/2" (1/4" if a small amount) and sew another seam. I then cut between the two sewn lines...instant half square triangle blocks! I save these up, seperating into baggies by size. When I have enough, they go into a quilt, or border of a quilt.