Studying for AP Exams

<p>Well I'm taking AP Calc BC, Government, English Literature, and Chemistry. I have a Princeton review book for each one. I want to start studying for these exams, in previous years I did do much studying outside of class and received 3's and 4's I want to get 5's this year so I'm going to put in the effort to study. My only issue is that I'm not sure how to structure my study time between now and may for 4 subjects. By mid April I just want to do practice problems, it's just in my mind it seems hard to study so many different subjects simultaneously (even though I essentially do that in school). I like enthralling myself into one idk. Really what I need help with is planning, I was just going to go chapter by chapter in each book. Any help would be appreciated. </p>