Verbatim answer from our course director:
"Read the BRS cover to cover."
I know that at least at my school the shelf will help you, more often than not, because they curve the scores in such a way to help out the people who are bordline passing or just under that line.
I'm with you on the freakout about it... Unfortunately, I definitely only have like 4 days during finals week to study for it (we're a traditional curriculum... Kicking myself for opting out of schools with block system).