It helps to know the major strong acids and bases, as well as the common periodic table groups (i.e. you should recognize noble gases, alkali metals vs. alkaline earth metals). It also helps to have the method for balancing chemical equations well practiced so you can do it quickly w/o thinking.
Also it's nice to know the types of nuclear decay so that you can handle any radiation problems that might show up.
For math, just dig up an old cheat sheet that you used to memorize for the SAT (i'm sure you have one of those somewhere or you can find it online), it's probably got all the equations you ought to know.