Few things will get you ready to satisfy women quite like getting in regular exercise each day, says Matthew N. Simmons, MD, PhD, of the Glickman Urological and Kidney Institute in Cleveland. “Even as little as 15 minutes of exercise daily will improve self-esteem, self-image, and libido,” he says. “Exercise makes the physical aspects of sex more enjoyable. Furthermore, making exercise a habit promotes cardiovascular health, which is necessary for normal erectile function.”