I use pinking scissors and the pinking rotary blade for trimming applique pieces (especially the curved pieces like hearts and things) that I use sew-in-interfacing with, make a slit in the interfacing to turn it right side out, I can't think of what this method is called, but Eleanor Burns uses it alot. It makes the seam lay flat when pressed. An Amish friend of mine uses the pinking rotary blade for cutting out clothing patterns. It is amazing to watch her cut out a black suit with it.
Junie