It is said that practice makes perfect. In the case of retired physician Demetrius Ellis, it also produces some divots in the backyard. After a neighbor introduced him to golf, Ellis spent hours practicing at home before he dared showing his face at a real golf course. In his retirement, Ellis has worked to find ways to stay in shape, both physically and mentally. Golf requires a lot of decisions — related to club choice, weather, terrain — to get the ball to the pin. “All those decisions … keep