These tips personally helped me in high school AP courses as well as in my college academic life. This is not exhaustive but I will update as I see fit.
Stay organized: A large three ring binder divided up by units will be very helpful in class or having your Google drive with different folders. Keeping things by units is immensely helpful when studying for the AP test.
Do your work yourself: if you are cheating, you will not practice for the exam and then most likely not pass the exam either
Example: when I was in high school, my classmates that cheated on AP classes most likely did not pass the exam...lots of anecdotal evidence.
Attend office hour sections: While you might not need help right away, being surrounded by fellow classmates outside of class time will be good because hearing their questions might help you learn something you did not know you had questions on. Also, do not be afraid to ask questions :) Being proactive in your studies will make sure you do not panic at the last minute.
Study Groups: outside of school hours, having times to work together will help you work on things together and to study.
Flash cards: real life or digital flash cards like Quizlet will be very handy to recall concepts/vocab especially when it is closer to the AP exam. While reading the textbook, start making flashcards for key concepts and vocab. As we learn in class, add more to your arsenal of cards. Reviewing them periodically will commit things more to memory
Example: I used flashcards in undergrad courses all the time. If you are thinking of being a STEM major, you will need to recall stuff from your lower division courses (usually freshman/sophomore years) to use in your upper division courses (junior/senior year). One reason why people change majors from STEM to something else is because they did not learn how to retain information and use them in new contexts in their upper division coursework.
Focus on “WHY”: while you will learn material in class, you should know WHY the chemistry topic works the way it does (especially in future units).
Do NOT be overwhelmed by multi-part questions:
For FRQs, the long-answer questions can have multiple parts (sometimes up to letters g or h). If you do not know how to do some parts, go back to them later and continue on with the exam. If the later parts MUST use previous parts, you are not penalized twice for having the wrong answer for the first part.
Example. If you answer part a wrong but you know how to calculate for part b using part a’s answer, you will get the point for part b but not a.
The Pomodoro Technique of studying helps break down monotonous studying. Another explanation of this technique
Using the GUESS method is VERY helpful for doing FRQs (& sometimes MCQs)
Make sure you review old material AND new material we learn throughout the year.
Units start slowly melding together where you use knowledge from the old units in the newer units. The assumption is when you are in the middle of the year, you can take info you learned from the past units to use in the future units.
My quizzes/tests are also cumulative to force you to review old stuff so :P
PRACTICE MAKES PERFECT. Look over old and optional assignments to get more practice.
Best study habit is NOT just rereading notes. That's not helpful that much according to MANY psychology articles. Check this out for better strategies.