If you have TBR, then I would use that, but since the both of us are taking the test next week I would just focus on the basics:
Coulomb's (particularly the 1/r^2 relationship).
Know F=qE and be able to turn it into mg=qE, and Work = qED.
Know Amps = C/s (I had to use this for a problem in the AAMC book).
Know the right hand rule, and be able to apply it quickly.
Know that you can multiply Coulombs law by distance to get work (because F x d = work).
Know that you can multiply the Electric Field by distance to Voltage (V = Ed)
(which can be done via Coulomb's again)...this also showed up in an AAMC book problem.
Know units! Be able to convert Joules to eV and visa-versa.
If you go on youtube you can find some great tutorials from India, but most of them are calculus intensive and not worth it for the MCAT.
I am sure I am might have screwed something up or missed something, but anyway, WE ARE ABOUT TO TAKE THE TEST!!!!!!!!!
good luck man!