I made burgers last night, but I made two changes to my usual routine.
(By usual routine, I mean, "Form patties, place on grill.")
First, I seasoned them like a meatloaf. In one pound of ground beef, I put about 1/4 cup seasoned bread crumbs, one egg, 1 teaspoon of Worcestershire Sauce, and 1 tablespoon of A-1 Sauce. Then I formed my patties.
I'm not sure where I heard to do this, but my next step was to make a small depression with my fingers in the center of each patty before cooking it. The idea behind it is that this thinner center will allow the burger to cook faster than usual. As a result, the cooked burger will be nice and moist. It worked! I highly recommend! The flavor was enhanced by the Worcestershire and A-1.