I'm heading out there later this year, first time in the Z - so I'll take it very easy but nevertheless... (actually after looking into insurance - I'm not going to risk it, I'll stick to track days instead)
New discs/pads (I like EBC yellow stuff, so will try on the Z), Motul RBF 600 (will do clutch fluid as well) & braided lines will go on (this is just because I want to change some bits so it's an excuse to do it beforehand).
I'm on Mich supersports, standard suspension (with a few superpro bushes) but probably on eibach sway bars when I go.
As you know it's about enjoying yourself at the end of the day, and being comfortable with the car