The Nova book has a really good section on Reading Comp. It basically says that there are only six types of reading comp questions. As you go through the passage think about those questions and start answering them in the back of your head: what is the main point, what is the function of the third/second paragraph, what is the structure of the passage. For the questions that are more specific you have no choice but to go back and look them up. Unless you're one of the 170-plus geniuses among us. LOL. You just have to get better at underlining the key points and circling key words so you know where to look. And practice, practice, dude. What also helps me is starting with the easiest, shortest passage -- which is never the first. Those get my confidence up and makes the longer, denser ones less intimidating.