The most important thing you can do to ensure a great day at the track is to arrive early. You should arrive at the track early (preferably the night before) to give yourself ample time to unload and get through registration, which opens at 7:00 a.m. Some good items to bring along are listed below:
Here is an article about how to get a good start to your Penguin experience.
For motorcycle and equipment preparation, please see the Equipment Requirements FAQ