The tips begin at a different place in each module. The advice moves along with the stages of the course.
It's difficult, but do your best not to overwork yourself the week before the exam. Stick to comprehensive review cycles in the days leading up and no more than a moderate practice schedule. Let yourself take the whole day off the day before the MCAT. You've done everything you need to do. Go into the test refreshed and relaxed. This is a million times more valuable than one more look at the Nernst equation.