Hearts suggestions are great. That is what I try to do. But I try to add two additional things a couple of people on this board pointed out. Relax your mouth and face into a slight smile. Not a grin, baring teeth, but curve your lips slightly up and breathe deeply. The second, I find that the tenser I get the closer to my ears my shoulders have become - all curled up and stiff. Relax your shoulder blades, uncurl your shoulders, sit up straight and breathe deeply.