Must agree with dino.
Drive with shagged tyres... put normal fuel in if you really want... but MAKE SURE YOU LOOK AT YOUR BREAK FLUID LEVELS, in fact you really should look at all your fluid levels.
I try to service my car before every track day, change all filters, and oil and check levels of all fluids. Check break pad wear (I have heard of people using up pads that were only half worn by the end of the day)
Anyway,
Updated above and next.