You have gotten some good advice on stealing. You can occasionally use the "freeze" on a delayed steal to take advantage of a sloppy defense. I would differ from a couple of the posts that say the runner should put their head down and not look for the ball though. After a few steps, a good baserunner often takes a quick peek (while running full speed) to see where the ball is so they can react quicker to wild pitches, popups, etc.