First of all, don't just do the tests...learn from your mistakes. There are different types of questions that are asked on verbal...logic, inference, detail, etc etc...the more practice you have, the more you will be attuned to what type of question they are asking and what type of wrong answers they would put for those questions. Make sure you don't get too involved with the passage--I mean, read actively by all means, but don't be caught up on every little detail. Read for the what the author's purpose is in every paragraph, and if a question asks you about a minor detail, you can go back to the passage. Also, another important thing to remember is that the answers is either in the passage or based on what is said in the passage--DON'T GET CREATIVE....I tend to believe that the reason people miss anywhere from a few to a significant amount of questions on the Verbal Section is due solely to the fact that they get creative with their answers...what you need to know is in the passage. If they ask you to infer something from evidence in the passage, look over the relevant evidence but don't add any input of your own. Keep it on a strict passage-based level of thinking and you should improve your score--it seems to be working for me. If you go through the passage and feel overwhelmed by the amount of information in there, don't be. Like I said you can paraphrase each paragraph into a sentence or so and understand how the author's ideas flow and what his purpose is paragraph by paragraph--and this is mostly what they will test you on--if you get the "gist" of each paragraph or main idea that is presented. Let me know if you have any other concerns about the Verbal Section...
