Before I say anything take this with a grain of salt – there are a lot more than 5 topics you need to know to pass, and these are only my opinion.
1) The different audit opinions and the situations that would cause you to pick one over another (GAAP vs GAAS, what falls under unqualified and what doesn't, etc)
2) The other services – attest, compilation, review, etc. Know what they are and what the requirements for independence, disclosure, and limited reporting are
3) The audit assertions used for account balances, transactions, and disclosures. If you know enough about accounting you can figure out enough on transaction cycles to get by, but you need to remember these.
4) The 10 GAAS standards and concepts like independence/ethics and the relevant general rules.
5) Audit Sampling. It's not a huge section on the exam but most people don't know much at all about it and need extra time to study. If you get a SIM or more than a couple questions on this topic knowing it can be the difference between passing and failing.
REG (7/7/11) 75
FAR (7/28/11) 76
BEC (8/27/11) 81
AUD (10/15/11, 1/20/12) 63, 91
DONE!!!