I fold used dryer sheets in 1/8 and touch lightly with a cool iron to flatten and then use them as leaders and enders. My needle seems to glide better and there is a huge saving of thread if you are doing much single item sewing (as opposed to chain piecing) and they are great in preventing the "ears" of triangles from disappearing down the needle hole and creating a jam or messed up pair of triangles from having "chewed up ears".