I find that as the foam starts forming, just before reaching a boil, I reduce the heat a little and it foams a little less. It may slow reaching a boil by a couple of minutes but that is better than a boil-over.
It never really does stop but the foam changes from covering the whole pot deep as heck and dirty looking to a foam that kind of rolls around the pot but leave about half of the wort uncovered. You can increase the boil to the point that you will fight it all the time but you do not need to.
Let it come to a solid boil spraying it or lifting the pot off the burner just before it boils over. Pretty soon you will see the foam change in color and size and that is when you turn the heat down a little. Oh and keep a eye on it when you add hops. It will try and boil over then as well