I've been saving used dryer sheets to use in applique. Just place one on the right side of the fabric with the shape of the applique piece drawn on it. Stitch around the outline, cut a slit in the dryer sheet and pull the fabric through the slit, flatten the fabric at the stitching line, press and then hand or machine applique. This is theoretical as I haven't tried it but I have lots of used sheets and can't wait to give it a try.