1. Brake fluid — flush if older than 12 months. 2. Pads — at least 50% remaining. 3. Tire pressures — start 4-6 psi lower than street. 4. Lug torque — re-check after the first hot lap. 5. Coolant — top up and burp. 6. Suspension — check for play. 7. Empty the cabin — loose items become projectiles.