Hi Chrissy-
I took my exam some years back, but I have proctored several exams.
My understanding is that the questions on the practise exams are 'retired' questions there were on the exam at one time. My advice to you would be to take as many practise exams as you can. When I was studying, I purchased 3 - 50 question exams, which together equal the 150 question test. I set aside 5 hours and 40 minutes and took the test at home as though I were at the test site. It's good to teach yourself just how long that is. Everyone seems to have a different method of organizing their exam time - some start from the back and work forward, others look for specific sections. I started at the front of the book. If I could answer a question quickly, I answered it and moved on. If I found myself spending time searching for the correct answer, I put an orange tab on the question and moved on. If I wasn't completely confident with my answer, I put a yellow tab - and moved on. When I got the the end of the exam, I went back to the beginning and worked on the orange tabs. After that, I went back and reviewed the questions I had marked in yellow. I found it a great way to manage my time.
Before you even read the question, take a look at the answers. Sometimes you can eliminate an answer before you even read the question! If there is an add-on code, and it's listed first you can cross off that answer! Modifiers can sometimes help eliminate an answer also.
Most important - if you are looking for a code, they will be using exact language from the book. Know your book. Know your Guidelines. Know your anatomy!
Good Luck!!!
Cindy