Cool - you'll love it, downward spiral now as the mods start building up 😃
How fresh is your brake fluid - may be worth changing, makes quite a difference to how long you'll be able to stay out for!
Make sure you get plenty of heat into the tyres before getting carried away
You'll prob find a tank of fuel will be enough, make sure it's topped up before you get there (with premium of course!) my mpg goes up after a good track day - talk about blowing the cobwebs out
What tyres are you running at the moment? The wear will be related to how soft they are (I scrubbed the outer edge off my T1R's, but would hardly touch a set of Bridgestones)