Being a veteran of only one track day at Mallory, Ill offer my 'tips'.
Do fold your mirrors in, I was worrying more about people coming up my inside, I wasn't concentrating on the corner.
Defend your lines, **** the idiots who wanna come down the 0.5m left of track on the inside of you, it's their problem.
I rode a lot better once I decided, **** it.
They recommend a 2psi drop in air pressure, I did this (was summer) and I checked pressures while warm and they increased by 3psi.
Remove your number plate when you get there.
I'd even cover up your speedo, stops you focusing on the speed rather than just riding.
I was in a mixed group of inters and novices in 30 minute sessions, I'm not a quick rider and I weren't the slowest, I even overtook a track bike
My sprint was less than 6 months old with 1500 miles on the clock so I didn't go too mad, but I was still outbraking half the group at the bus stop hairpin.
Expect to be knackered, it's very tiring.
Enjoy it, it's great fun