No Easy Way
At least I couldn't find one. I bought two study guides. One was pretty decent, but a little too easy. The other was edited by doctors, and it showed. I felt like I was studying for my MD, not EMT. Believe it or not, there are questions that a Dr. will answer differently from a Paramedic, because the Dr. does not know how we process patients in the field.
Anyway, I found there are two types of material you have to study:
1) Book stuff: The layout of the heart, the signs of a diabetic emergency or stroke, etc.
2) The scenarios
IMO, there is no way around the book stuff other than to read and become very familiar with it. Notice I didn't say "memorize" because who can memorize all of that in a short amount of time? Impossible!
My class was kind enough to wait a good 3 months after the class before scheduling my clinicals, so when it was time for my test, I was less than fresh. I crammed for 72 hours straight, reading through my whole book in that 3 days (well most of it) and taking the practice tests in between sessions.
As for the scenarios, you have to break it down: 1 Trauma and 2 Medical. Go to step 2: mental status then step 3 based on the results of number 2, etc. You need to memorize the procedure. For each step along the way, there is only one right action. There are always priorities. I swear, I think if you just concentrate on airway, you will get 80% of the test right.
I am exaggerating, but you get the point. It always comes down to those basics, ABCs, then whatever the chart says you do. Memorize the method. You find a victim with significant MOI, what is the first thing you do? What always follows that, and the next thing, etc.
To me, the only questions that are really hard are the prioritization questions. I realize there is one best answer, but no matter how you do it, there is always too much room for interpretation. For instance, do you transport the person who fell 15' or the lady with the compound femur fracture thats swollen to hell and gone? If you picked the lady with the femur you're wrong, though that is what I picked. IMO, she could be going into shock and die, whereas the fall from 15' could have a broken ankle. Oh well.