As mentioned in another thread, if you want any advice on OASC use the search facility at the top of the page and search for 'OASC' You'll get a huuuge heap of posts to trawl through!
There's only so much that we can tell you, just get your mental arithmetic sorted, and be confident at all times.
Oh yeah, try and enjoy it, I've loved it twice now - still waiting for the latest result
I'll keep you posted DA
Al