Always implement beer into your sporting events. This works best with golf, bowling, shooting, billiards, horse shoes, ping pong, relay races, kayaking, and hoops. Bring lots of friends.
Every so often, use the old noggin. Put away the calculator, or the phone, or the computer and try to do math the long way. It will keep things fresh in your head. Minus two plus two, fill the hole
Check out the fireworks. Sit and watch the show. Be careful not to use your own. It's probably illegal anyways. Your hands and face will thank you for it.