From here to there

Google Maps gives great directions from point A to point B. You can even add points C, D, and E and Google Maps will take you to all of them, in the order that you entered them. What Google Maps won't do, however, is tell you that it might be more efficient to go to point D before going to B and going to E before going to C.

My wonderful son-in-law found a site that will do that for you: http://www.myrouteonline-planner.com/