Just as physical exercise can make and keep your body stronger, mental exercise can make your brain work better and lower your risk of mental decline as you age. Play games you are not already familiar with that involve strategy, like chess or bridge, and word games like Scrabble. Try crossword and other word puzzles, or number puzzles such as Sudoku. Read newspapers and books that challenge you. Get in the habit of learning new things like recipes, driving routes, or a musical instrument. Take a course in an unfamiliar subject. The more interested and engaged your brain, the more likely you’ll be to continue learning and the greater the benefits you’ll experience.