10 Amazingly Simple Tricks To Turn Your Brain Into A Powerful Thinking Machine There are two basic principles to keep your brain healthy and sharp as you age: variety and curiosity. When anything you do becomes second nature, you need to make a change. If you can do the crossword puzzle in your sleep, it's time for you to move on to a new challenge in order to get the best workout for your brain. Curiosity about the world around you, how it works and how you can understand it will keep your brain working fast and efficiently. Use the ideas below to help attain your quest for mental fitness. 1. Read a Book Pick a book on an entirely new subject. Read a novel set in Egypt. Learn about economics. There are many excellent popular non-fiction books that do a great job entertaining you while teaching about a subject. Become an expert in something new each week. Branch out from familiar reading topics. If you usuall...