I do similar to what Tartan does re the stitching except that I 'lock' each stitch. If I'm using hand quilting thread to sew down the binding to the back I'll only use one strand of thread. If I'm using a standard 'dual duty' thread, I'll mostly use a doubled strand. I also use Thread Heaven which helps keep the thread from tangling. And try using a shorter length of thread to control the tangling as well. And like Tartan, I sew down my mitered corners on the back as well - sometimes only 1-2 stitches - sometimes more. Depends on how nicely they come out on a given quilt.