Get some pads, some Super Blue brake fluid, change your oil / check your other fluids. Make sure your wheels bearings / tie rods are in decent shape (no play.)

Make sure your helmet has a Snell (I believe is the sticker - getfast or vbspec can confirm) sticker - mine did not and was not passed for tech at my second track day. Luckily Jon had loaner helmets.

Most important thing IMO is to be open to instruction and learning, rather than going to the track thinking you already know what you're doing. While I felt like I knew a decent bit of what was taught (from reading books like Secrets of Solo Racing,) you're better served to take in everything as if you know nothing.

I hope to do NASA in Feb., I'm sure there'll be a thread. Someone from here will be there, pit with them and you'll be fine.

One last thing - do NOT camp in February. My broke ass is sure to be down to split a room at Sleep Inn.