I trim my quilt (front, batting and backing) so I have a nice clean edge to work with. I use the french fold technique for binding. I use a 2 1/4 inch binding, fold in half and then sew my binding to the front of my quilt at 1/4 inch...so that the rough edges of the binding is along the edge of the quilt. Then I fold the my binding towards the back and blindstitch it in place by hand.
With this method there is no loose areas in the binding as it's wrapped around the full edge of the quilt.