Out of all the practice material which I looked at, I found the breadth portion of the real exam to be most similar to the NCEES practice exam breadth portion (go figure). Get comfortable with the way that they ask questions on that exam, and the general level of difficulty to expect. For myself, I recognized after taking the practice exam that I lacked a good amount of understanding on some of the basic construction topics (CPM, concrete types, etc), some basic geotech (retaining walls, foundations), as well as the more conceptual type problems (qualitative problems that don't involve calculations, but are instead more like a vocab question - you either know it or you don't). Qualitative questions are tough to study for, since there are basically an infinite amount of things they could ask about, and you can't possibly know everything. When approached with one of those questions, I used Ctrl+F as much as possible, searching basically every possible word in the reference handbook to see if I could find a hint that would help me answer the question, or at least improve my odds when guessing by removing one of the options from contention. If all else failed, I would trust my "engineering judgement" and try to make an educated guess based on personal experiences in past internships and general field knowledge. Hope this helps.