This may seem trivial, but DO NOT stress over organic chemistry (you probably weren't, but just don't). I did, and there was only one multiple choice question regarding it on the test, so I was stressed for nothing.
You NEED to know your Equilibrium problems- all types, there is garunteed to be one on your test! Atomic structure, such as bond types and shapes doesn't hurt either.
Know you are at a great advantage having a year long class (I only had it for a semester), so make the most of it now!
Good luck!