Before I sat my finals I found out that the previous years' papers were available in the uni library. So I studied them, worked out where the questions were coming from, prepared my essays in advance and memorised them the night before. Worked a treat. Also, I don't get exam nerves. My first was due not to a sparkling intellect but cramming and a dash of bullsh*t. There were others on my course who should have got firsts but ended up with 2.1 or 2.2. That's why I think ongoing assessment is better.
Anyway, good luck to all. Whatever you're sitting. Glad it's all over for me!