Couple of other items I've found useful:
-Bicycle or pit bike in case you wind up being a long ways from the rest room or group if it's a structured learning trackday.
-Tire gauge should be a low pressure one that increments by one pound and typically only goes up to 50 pounds.
-Sunscreen and lotion to help prevent yourself from being sunburnt and lotion for in case you do. Also, lotion helps in case you have any bad chaffing from suit
-Generator for powering up your devices such as tire warmers, radios, etc. Buy one that's decent quality
-Bodyglide
http://www.bodyglide.com Great for preventing chaffing in areas such as neck where the suit rubs a lot