It is not difficult. It's all very basic math, logic, reading comprehension and critical analysis. It's all very straight forward, and in case you didn't know it's all on computer now. The critical analysis section deals with analysis of an argument, not of an issue. There are sometimes questions that ask you how to strengthen the author's argument though, so you will actually have to think for those questions. :) As a disclaimer though, I'm generally a good test taker. The best way I can think of to study would be to grab a Barron's or Kaplan's book and just practice the questions. After a couple practice exams yo'll do fine. Just don't be nervous about it, keep your cool and you'll perform well.