along with what everyone else is saying, i would just like to emphasize one thing. READ.
read everything from scientific american, history, economist, op/ed pages of newspapers, national geographic, and the new yorker. the more you read, the faster you read and the faster you will comprehend the text. i cant stress this enough. aside from the courses and the strategies, the key to this test is your ability to read at a fast pace while understanding the text. all the other strategies, formulas, and setups can be learned within a given time. however, reading will take a while to master, unless youve already mastered it.
again, just my 2 cents.