Have you completed all of the other PTs from 36-78? If not, focus on those. If you have, I would recommend retaking tests that you didn't score all that well on. BR them like you would any other PT.
@"Cant Get Right" thank you for clarifying that to me. Also, if I am, for example, weak in NA, should I go print out questions from PT 17-36 and do them, watch explanations and try to understand? Or how should I drill them?
You mean via the problem sets? You're probably better off starting your PT/BR phase now. I'm almost positive that the majority of us still have a handful of unfinished pre-36 questions. Save those for drilling, if you need them.
@tanes256 Yeah if you have more than 3 months to study, I would definitely recommend taking your time with PTs. I was super strapped for time and wanted to complete PTs 36 - 78 before September.