I sew my bindings all by machine. I make double fold straight grain binding, sewn to the back of the quilt first and then turned over to the front. I stitch it down with either a straight stitch or a decorative stitch. I learned to make binding by watching Kaye Wood on PBS. My corners always come out just right using her method.
http://www.youtube.com/watch?v=uf7Mm_mkbCc&feature=plcp
Sharon W.