Keep it simple. The casting director wants to meet a person, a real person. So when they ask you, How are you?" What are you gonna say? "OK", do you want them to remember you? Be honest and answer.
Show up on time. I can't stress that enough. The last thing you want to do is rush around before you get in the audition room. Steady and calm. Come from a grounded place. Take some deep breaths and know what you doing. Actors action, what is your action? What are you doing in the scene? Know your lines. Lastly, that audition room, is yours, so own it. Don't over think it, you work really hard to get in that room, so play in your space. Play.
Break a leg out there!