My top suggestion for the write-on would be to not violate your school's non-collaboration policy by asking for tips for the write-on.Will you get caught? Probably not. Are the tips you may get from an internet board worth even the .05% chance of you getting caught? Probably not.
Apparently your non-collaboration policy is less stringent than the one at my school, then. Hell, if I read the Volokh book now I will be cheating, even though I read the Volokh long before the competition started. I think I am cheating if I even remember something that was in it:P
Um...then why are you reading this thread?