The best tutorial I have EVER seen is the binding in 5 easy steps tutorial on this site. I've tried Sharons and various youtube tutorials and I simply cannot get it right.
I tried this tute 5 or 6 quilts ago. I loved it so much, my binding is so precise, that I pull up the tute each and every time I'm binding something. I've used it on all sizes from lap/toddler size to queen. LOVE IT LOVE IT LOVE IT!