1. Finish a crossword puzzle. Just like a walk exercises your body, puzzles give your brain a workout. Think how satisfying it is to fill in that last clue.

2. Pick up a book. Whether it’s the latest novel by your favorite author, a new historical work, or a how-to book, reading keeps your brain active and nimble.

3. Try your hand at bridge. Or if you’re already a mean bridge player, keep it up. Card games provide ideal mental exercise as the brain ages.

4. Become a social butterfly. Well, maybe not a butterfly, but turning off the television and interacting with friends and family will keep your brain young.

5. Have a brain-healthy diet and exercise plan. This includes eating lots of dark-colored fruits and vegetables which are thought to slow the brain’s aging process, limiting fat and alcohol intake, and exercising – which will also keep dangerous stress levels down.

To learn more about how you can prevent Alzheimer's Disease, read our guide to prevention.