I'll throw my .02 here, to add to others. Here's how I prepared:
First thing I did was look up the exam specs and print out that page. Then I came on here and looked through all the (extensive!) info that's been posted about reference and study materials. Digested a lot of that and started making a list of what I wanted to buy.
Bought a bunch of references and sample exams around the beginning of January. From there, I started doing practice problems in the Spin-up exam book. The problems are easier than they are on the test but as many others say it builds confidence. After about one test's worth of those I was getting kind of bored with it so I started with the NCEES exam. These are much better practice problems but also more difficult. This sample exam will give you a good idea what kind of skills you will need on exam day. At this point I hadn't gotten very familiar with any of my books so I was mostly looking up reference info online, and printing anything I found to PDF for later, and trying to tab my books where it made sense (I mostly just tabbed chapters, which turned out to be fine for my purposes).
After struggling with the NCEES problems for a few weeks I took a break from doing practice problems. Through most of February and March I just kind of read through the Camara manual and my machinery book, which I like a lot. Definitely something I'll keep on the shelf in my office. I discovered I was quite weak in motors and so the time spent was well worth it to brush up on this stuff (heh, no pun intended).
Towards the end of March I started back into the practice problems although I really wish I had spent more time with this. I did the second Spin-up exam and worked through some more of the NCEES problems. As I worked the problems I went online and got more reference info for areas which weren't covered in my books (and some which had better or more understandable info). I started culling through my PDFs and printing things and making my binder, with copious tabs.
A week or two before the exam I felt I had my binder pretty well-made and knew my references pretty well, so I did a simulated exam on a Saturday where I sat for a whole day with the NCEES sample and no internet access and worked every question.
On test day, I followed the "grading" system laid out in Spin-up to rank problems as I went through. I feel this method saves you a LOT of time scratching your head and allows you to get all the slam-dunk questions out of the way early. I felt the AM portion was much tougher than PM, as I was only able to answer perhaps 10 questions in the first pass. Second pass is the code questions, I whizzed through that portion because, lucky me, I work with the NEC every day at work and know it quite well. I finished the AM with about 30 minutes to go, and left just a bit before they called the 15 minute warning where you have to sit and wait to the end.
The PM I did the same procedure, but found the questions much easier and was out of there in about 2 hours. I felt very confident heading home, but as the months went by my confidence was eroded. By the time results came out, I was a wreck. BUT, I should have stuck with the initial feeling; I came out with a passing grade.
Here's what I brought to the exam:
-My own binder with notes
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2011 NEC Codebook (not handbook)
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Camara reference manual
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Electric Machinery Fundamentals, by Chapman
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Spin-up by Lanza
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NCEES Sample Exam
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National Electrical Safety Code Handbook
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Handbook of Electric Power Calculations by Beaty
Binder was immensely helpful, I was in there for probably half the questions.
NEC was as helpful as you'd expect, and I didn't feel I was missing anything by not having a handbook, but YMMV. I do use a handbook now that we updated to 2014 and a lot of the explanations are good. I actually feel the straight codebook is easier to navigate, though. Make sure you get a set of pre-printed tabs for whichever one you bring. I like the
color coded ones.
Camara was ok, I might have cracked it for 4-5 questions in each portion.
Chapman book was great. I kept that one out for a lot of questions.
Didn't use sample exams for anything on test day, that I can recall.
NESC - the handbook is not the actual code, it's actually just explanations of code sections. Not sure it would be more helpful to get the codebook, but I didn't use the handbook for much.
Beaty came in handy for a couple of questions which I couldn't find elsewhere.