I took REG last window.  The CSO/SSOs listed on the AICPA website are good representations of exam content.  My best advice:  Have a gameplan to tackle the exam.  I gave myself 30 minutes for each MC testlet, and 90 minutes for the TBS.  Just keep yourself on a reasonable timeline so you can at least finish the exam.

Remember they only get to ask you 72 MCQs; the questions are designed to test your knowledge of a huge body of information.  You might get a super detailed question or two, so I wouldn't lose much sleep if you can't remember the phaseout amounts of various tax credits. 

But I would spend the last week focusing on the topics you're weakest in.  You'll earn more points boning up on the weak topics than you will trying to ace topics you're already proficient in.  You've only got a few days left, so get the most bang for the buck you can.  Good luck!!

Thanks Puck!  Great advice and congrats on passing REG!