Be on time for tech, classroom and driver's meetings.
Listen to your instructor and go to all of the download sessions after each run.
Don't be in a rush to solo, you paid for an instructor so use his/her brain. I have never soloed a novice though some NASA guys will in order to get back to their race car.
Drinkma lot of fluids, dehydration happens quickly and is not your friend. If you aren't going to the restroom before each session you are not drinking enough.
Be careful if the track is wet, that is one of the slickest tracks in the rain I've ever seen.