Mai,
Try to get your hands on as many practice tests as you can. Take them by timing them exactly the way the do it on the real MCAT. Read scholarly magazines like the New Yorker and the Atlantic Monthly, as well as the Economist. I raised my verbal score by 2 points by just reading everything I could get my hands on. Get a copy of Columbia Review's Verbal Practice Builder and the book Columbia sells that includes 3 full-length practice tests. If you are taking a prep course, attend all the practice test sessions. I never found the Kaplan MCAT lectures very helpful, you can read all that stuff in the books, but the verbal/writing lessons were excellent. I only did the practice writing assignments they gave me in class/practice test sessions and I scored an S in the writing sample! Lastly, try your best to get up early (at the latest 7am) and read those magazines I talked about or do full-length verbal passages. You need to get used to reading that early in the morning. This is very important, especially a few months (2-3) before the exam. I think I got lower scores than I deserved because I pulled quite a few late nights before the actual exam and was quite tired on the day of the test. Don't make my mistake! Good luck.
EDGAR