I'd say do a practice exam NOW if you haven't already. If there's something you aren't very strong on or forgot to study the practice exam will expose it. It's much better to find out now than trying to learn or brush up on something a week before the test.
That being said, I only used the NCEES exam study book/test and I thought it was very representative of the difficulty, type, and subject matter you WILL see. (Seriously, you WILL see the subject matter and individual types of problem that are in that book, plus some others) The NCEES book also has the worked solutions in it, which shows NCEES line of thinking for answers and is what they will be looking for in both the morning and afternoon sessions. What I mean by this is that I had a way of solving certain problems that gave me slightly different answers than were on the multiple choice questions. Not different enough to be wrong in the real world, but for example, when your answer is 550 k-ft and the choices are 480, 540, 568, and 600, which one is correct? Knowing their method eliminates this problem.
So, work the NCEES problems and be sure you know how they want you to solve them. Just for reference, I worked every problem in that book probably 3 times, and made notes on things in the code and things to watch out for as I did every time.