Learning Vocabulary - There is no point in doing any practice until you've memorized the 400 most frequently appearing SAT words. Without a strong vocabulary base, you'll just get murdered by the passages and answer choices you don't understand.
Find Your Untimed Dictionary Score - Before you start practicing, you need to figure out your untimed dictionary score (UDS). The gap between your UDS and your actual score reflects your lack of vocabulary and speed.
Learning to Read - Do not do the entire test or multiple sections at once. Do not time yourself. Take as long as you need to figure out the passage.
Learning to Eliminate - Once you've read and understood the passage, it's time to look at the questions. For each question, always start by eliminating answer choices, the ones you know for sure are wrong.
Correction - Once you've completed the entire section, use the answer sheet to star the correct answers on each page.
Reflection (The Most Important Step) - It's important that you come out of these review sessions with concrete, specific reflections on what went wrong for each question. A tutor can help during this phase.
Ramping Up - After you've repeated the steps above for 4 practice exams (4 reading sections), it's time to put your skills to the test. You should have quite a few SAT words under your belt and you should feel much more comfortable with the passages.