Gre_K: I seriously doubt if GRE is an indicator of IQ or Math ability. I think what got me through was calmness during the test and ability to see through ETS's traps.
And about the essay competition, I'm sure you'll kick my ***. I'm just glad to get 5.0 in my AWA, could'nt really expect more.
Shad: I think you should do BigBook questions. I learnt a lot of ETS traps present in RC's by doing BigBook. Reading the passage is one part, but looking out for the differences between similar looking right and wrong answer is a totally different thing.