Best way to start studying for AP Calculus and AP world exam?

I have my calc exam on May 5th and world exam on the 12th, does anyone have any suggestions on how they studied for these subjects? I also have my calc final on April 30th that is basically a full length practice AP exam, so I was wondering if there was a way to review as quickly and effectively as possible for both the final and the exam

I have no idea for world history. For calc, though, I would take one of the official released exams (doesn’t matter what year it is), and then review concepts you’re fuzzy on through Khan Academy. Other than that, it’s just ironing out stupid errors. Good luck with your prep.