Yeah, I will try... (you are not a moron!).
Relax,
Take deep controlled breaths when on the track,
Don't be so hard on yourself,
Make having fun your #1 priority,
Always remember...
it is a trackday and not a competition.
realise that all men are created equal,
you are the SD GOD!
cjc, joe wishes you good luck... I hope you have a favorable experience. Last week I was actually thinking of you doing a trackday... I do not know why I was thinking it but now this... please take some pics of your fine day/weekend to share with us all!! I know you wanted practical technical advise about the track but what is in your head is more important than other things you can not control. this is the best I have for you.