Before the game starts, be sure to fill out your lineup cards correctly. Cards with built-in carbon copies make it easy to give a copy to the umpire and the opposing manager, or look for a dry-erase clipboard that can be used over and over again. Use a radar gun to see how your pitcher's velocity is holding up towards the end of the game, when fatigue is starting to become a factor, and be sure to keep tabs on the opposing pitchers as well.