Know how to look at organic molecules and quickly convert to molecular formula. Know how things are changed during reactions for the passage section. Know oxidation numbers. For instance, it might say, "In Reaction 1, what happens when Molecule 1 reacts with Molecule 2?" and the answers might be, "Molecule 1 loses a water molecule" or "Molecule 1 is oxidized/reduced." Just be able to recognize things like that quickly.
