I took a class on Paperless Paper Piecing and used the book "Painless Paper Piecing" by Marjorie Rhine. It was wonderful. (If you are using a copier make a 1" mark on your original pattern to use it as a control.)
The book shows how to make templates and to mark so the "pieces" are on the straight of grain. This was one of the most helpful classes I've taken. Love paper piecing!