I like youtube tutorials, I like to visually watch how each step is done, it's easier than understanding written directions. Here are some links. Hope this helps.
YouTube on quilt piecing curves:
http://www.youtube.com/watch?v=TqbO8894fAI
Crazy Curves youtube:
http://www.youtube.com/watch?v=SOhzcAznt2s
A tool for quilting curves for all machines:
http://www.youtube.com/watch?v=Z1-GlioRAKM
Sewing sharp points and smooth curves:
http://www.ehow.com/list_6712860_app...ting-tips.html
Quilting Curves, here is a tip:
http://www.ehow.com/how_5413159_make...-quilting.html