I normally will stitch another line about 1/4"-3/8" from the other line to make exta HST if they're large enough and then put them in my "Extra blocks" container or I use them somewhere on the quilt or backing. Just hate throwing away good fabric if it can still be used. I always miter my strips when stitching them together such as sashings and borders. Some folks think that's such a waste but I don't throw them out but place them in my "Cutouts" container. You never know when you'll need a triangle for something. Only save them if they're large enough though again.