AP Language, Chemistry & US History

<p>I am taking AP Language, Chemistry and US History this year and i've been doing pretty okay so far. I have bought the Princeton review book and barron's flashcards for US History and the Princeton book for Chemistry as well. I will have about a month to prepare for all the exams so can someone give me advice on how to study well for all of them so I can make 5's. If i go through the review book should i take notes?
Thanks in advance!</p>