Healthy Aging | How To Keep Your Memory Sharp As You Age By: Stacey Colino | Jun 15th 2007 - Forgot where you left the car keys? Can't remember your mailman's name? Don't worry. Even though many age-related cognitive changes are a matter of biology, you can take steps to ward them off as you get older. Practicing good health habits and exercising your mind can protect your brain"'"and probably reduce the amount of mental decline, or push it back later into life,"' says Cathy McEvoy, Ph.D., a professor of aging studies at the University of South Florida in Tampa..