the main thing is make sure your car complies with the required tech inspection and u have the needed safety gear.
second, make sure your brake pads are good, and you want to do a full brake fluid flush, with a high boiling point fluid (i use the Ford dot 3 (550ºF iirc))
third, change your oil
fourth, enjoy! i did my first track day last month and loved it. I have another in 2 weeks. I'm very excited
for auto-x: '04 Liquid Grey ZX3
for street: '02 Infrared SVT