Cut your bias strip (mine is 3" wide), fold in half wrong sides together and press. This is sometimes called a French binding. Sew to the wrong side of the quilt to within 1/2" of the corner.
Stop, cut the thread. Fold the binding to form a right angle away from the quilt.
Fold over the quilt, lining up with the edge again. This might look all wrong, but it actually works. Continue sewing until the next corner.