I'll just say that if you studied for more that 100 hours, you know more than you think so don't freak out
Remember that S Corps, Partnerships, C Corps, all have different basis calculations. Mentally (rather than physically) map out all of the call of the questions pertaining to the entities (Basis, Gains, Losses, Taxable Income, Profit, Nonrecourse/recourse liabilties, what's not included in one calculation that's include in the other, etc.)
Read the Foreign taxation sections at least once thoroughly. I got about 11 MCQ on both testlets combined and although I think they were the “practice/mock” questions or whatever you call them…I seen way too many to feel comfortable about passing, even though I did
Remember that you can use your authoritative literature in the SIMs and some SIMs may want to to use the literature even if that call of the question doesn't request it
Remember to go with your muscle memory and not to freak out
Do all of the one liner questions first, don't even read the long questions…then once you're done with the short questions, go to the long questions, this is especially important for REG. You'll thank yourself later.
Most importantly, do not accept defeat even when you feel like the test has outdone you