Remember 3 things...
1. Walk the track several times. Do the best you can to learn it before driving it.
2. Look ahead. Don't look at where you're going into a corner, look at where you want the car to be when you come out, and just put it there. Sounds odd, but its instinctive.
3. Slow is fast. The harder you try to drive fast, the more flamboyant and out of control you get, your lines turn into garbage, and you get nothing but disappointed. Drive smooth and follow good lines, and you will get results.