One great way to make your brain smarter is to grow new synapses new connections by literally making new connections, interact with more people, learn what they are thinking about what their interested in and be exposed to all new ideas, go to more events, hang out at a bar more, join a group, or a club, take a class, join the Masons do anything where you can go and meet new people be exposed to new ideas. Expand your knowledge base and continue to be smarter.