1. Read through each section, every passage, every question, even the ones you got right.
2. As you read over your answers, try to remember why you picked the answer you did. Again, even for questions you got right.
3. Then, read the reasoning behind the right answer.
4. If your logic in step 2 does not match the correct reasoning of step 3, this is a question you need to study. If you got the question right for the wrong reason, you will get the question wrong on test day.
5. Keep a notebook of questions you got wrong. Write down the question, the content, and why your logic was incorrect.
Source: I got a 522 on my MCAT. Got 518, 519, 521, and 523 on my FLs.