Just don't get p*ssed up the night before, you'll be fine. Also resist the temptation to have a large fry-up for brekkie as they take your cholesterol (although I am reliably informed that they do not fail on this - it's mainly as a screening for your personal benefit).
cheers!
foggy
edit: I see you're not in the UK - the above stands for a JAA Class One taken at Gatwick