Make sure you plan your day at the track so you are not rushing around. The driving needs to occupy the majority of your mental capacity before, during and after your sessions. When you arrive in the morning you’ll have a lot to do: unloading; signing on; scrutineering; getting yourself changed into your kit.
Don’t arrive last minute and rush around in a flap, give yourself plenty of time. Expect there to be queues at sign on and scrutineering and aim for at least an hour of down time before you head on track to get yourself in the right frame of mind.