If you're at the ballpark: Watch the enirte game. That is, watch what other players do when they are not directly involved in the play at hand. Watch the interaction of the various fielders on a play, Look for players backing up plays, cut-offs and fakes, runners advancing or not advancing. Watch the third base coach and the managers' signals. Try to anticipate what the manager will do in a given situation (steal vs. hit-and-run, put in a reliever, etc.).