Pitching With Runners In Scoring Position
One of the things I did in pro ball when pitching with runners in scoring position (which happened a lot since I was a closer, especially when I was called in to pitch in the middle of an inning), was to analyze how batters changed their approach.
With runners in scoring position, some batters get less aggressive, some get more aggressive. So I always tried to observe what the batters' tendencies were.
This gave me an idea about whether I could expand the strike zone a bit, or whether I needed to be more fine with my baseball pitches.