Thanks Newkid for that great website. Strangely enough, I'm weak on problems that are generally considered "easier" such as %, work, rate and profit problems. I like how this site groups the questions by category.
Thanks Praetorian for your suggestions. I'll definitely start using LSAT materials. My RC and CR scores are so erratic on practice exams. Sometimes I do well, getting almost everything right, and sometimes I get half the questions wrong. It might be due to my nerves.
To tell the truth, I'm also afraid of overstudying. After a certain point, at least for me, studying more can be counterproductive. When I compare studying time with my friends (who received over 700 score), I've already studied twice as much as others (2.5 grueling months.) They typically studied about a month or month and half. I won't study like crazy like the past 2.5 months, but take Praetorian's advice and focus on my weak points and keep a log.
Thanks for all these useful suggestions and this great site to vent all my worries and frustrations about this test!!!