I was reading this morning from Jeff Galloway's book Running Until You're 100. He recommends that we run with a light touch such that we don't hear our foot slapping the ground. He said that a light touch is the way to overcome a tendency to bounce. Running with a light touch is part of his "gliding" procedure.
He recommends running with a shuffle to conserve energy. Raising ones foot high off the ground takes energy. "As long as you pick your foot up enough to avoid stumbling over a rock or uneven pavement, stay low to the ground. Most runners don't need to get more than 1 inch clearance, even when running fast." I'm a natural shuffler and have always run with a shuffle.