I do the same thing as Tartan does....audition where the seams are landing on the quilt. If any of the seams land on the corner, then I move the binding a few inches or more as needed. Sometimes the quilt may be uneven for one reason or other. For example, if one side is half an inch shorter than the opposite side, I would use the measurement of the shorter side and ease in the opposite side so that both the sides are the same length after the binding is done. Hope this makes sense.