If you're taking practice exams, try noticing a pattern in the genre of passages where you are missing the most questions.
For example, language learning theory is the topic of at least one passage on many practice exams. If you are missing questions there, try to find a little extra time to go to the library and look up the two biggest names in the field, and read through some simplified abstracts of their work. Figure its one whole afternoon spent. You'll feel more familiar with the terms, and the topic won't feel totally foreign to you. For language learning theory, it would be Chomsky and Saussure. Since Chomsky may likely be the second most quoted researcher on the planet after Freud, his ideas are likely to show up on an MCAT verbal in one way or another.
The usual verbal test-taking strategies are useful as well. Quiz yourself on main idea of each paragraph/passage, note tranistions, etc. Go back and review every question you get wrong, and note WHICH TYPE of questions you're getting wrong. If you can't narrow a topic down precisely in terms of outside reading, get a little creative. If you want to, say, practice reading passages on state and local government, go for the Federalist Papers. They deal with the thinkers/thought behind estabishing the federal gov't.
This sort of reading is more difficult than a Wall St. Journal article, and that's why you should spend some time doing it. Get used to reading some hard stuff w/o the time pressure first. WSJ articles are more useful for current events knowledge for the writing sample.
11 V, 10 B, 7P, for what its worth.