I would definitely approach the AAMC section banks as if they were exams. I split them in half so I basically got 2 extra exams out of it. As for re-taking the other ones, just try your hardest to focus on reading the passage and answering the questions based on passage info and not just jump to the answer you might remember. As for P/S, as long as you know everything in the 100 page Khan Academy study guide and actually read the passages for data analysis questions you can get a very high score in P/S. Here's the link to the document. The reddit page has the 300 page one as well, but you really just need to know the 100 page.
https://www.reddit.com/r/Mcat/comments/7y1abq/here_are_the_links_to_the_khan_academy_ka_300/
https://www.dropbox.com/sh/y4ancipr305f001/AACb2JdaeWdCftOrb7UkRqpza/KA%20Notes%20-%20Psych%20and%20Sociology%20-Version1%20%28100page%20version%29.docx?dl=0