*coughs* Honors Pre-Calculus, Honors Roman History (AKA Honors Latin III), AP US History, Honors American Literature/AP Language, and AP Chemistry are my classes. Oh, and on-level Physics. Next year it will probably be five or six AP courses (Environmental Science, Biology, Economics, Latin, Literature, and maybe Calculus) and no honors.
I'm probably doomed, but I think I can handle it.
Oh, and if it's history readings: For the love of God, do not skim. Skimming is bad. You need to read all of it, not just the bolded bits (if there even are any). Trust me; I got a 5 on my AP World History exam last year. Reading is a necessity to do well.
I do agree with Namiko about going day-by-day, though. Try not to worry about grades; just concentrate on really learning the material. If you have spare time during the day, use it to try to do your readings (I usually finish mine in the time between when I get to my desk and school actually starts) or other homework. I generally work through lunch. Make sure you don't burn yourself out, though.
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cogito, ergo sum.
non cogitas, ergo non es.