The main point that stuck with me from the lecture on directing is that when talking to the actors it’s important to encourage them to arrive at the same conclusion that you do as the director, rather then explicitly give stage directions, so they better understand their role, and give a more motivated performance.
The other main point I took away from the lecture was the director needs to be paying close attention to the actors as often as possible and to keep them as comfortable as possible in a set that might be full of people all doing different things; it is the director’s primary concern to ensure the actors are focused and aren’t distracted by anyone or anything else on set that might alter or hinder their performance.