Reading comp started out as my strongest section and is actually not my weakest. I havent gone down in reading comp, but I have made large improvements in the other sections.
I think the best approach is to read the passage entirely and summarize it in your head before moving on the questions. Summarizing may take some time but it saves time once you get to the questions because you have already thought about the passage. I started to jot down notes in the margins, noting in particular main points, cause and effect and evidence of the authors perspective. This also helps to anticipate questions and locate answers more quickly.
I do not always get to every question in the section (usually dont get to the last 2 questions), but I am getting more of the questions I do correct.