What kind of prep have you already done for verbal? I'd recommend going through the OG11, and for each question, really stop and analyze WHY you got the question right or wrong (yes, even if you answered the question correctly, you should really think about it, look at the other answer choices, and be able to explain why the answer you chose was correct and the other answers were not). Try not to breeze through the questions, since that probably won't help you as much.

Also, when taking your practice tests, pay attention to your pacing on the verbal - are you spending too much time on the questions and running out of time at the end, or not enough and have too much time left at the end of the test? Try to find a good medium - pace yourself on the questions on your practice tests and then apply that to studying as well.

Good luck!