The brain, like many parts of the human body, needs regular exercise in order to maintain strength and vitality. Some more common brain strengthening exercises include fun activities like crossword puzzles, Sudoku, and other word- and number-based brain teasers. There are other more academic ways as well, like completing math word problems and exercises relating to spatial relationships and geometry. Even simply reading this article gives your brain a slight workout. If these ideas are a little too scholarly for you, try simple things like mixing up your routine. Just brushing your teeth with the opposite hand or walking a different way to work forces your brain to work harder than usual, which is ultimately what you want to do.