I NEVER spent more than 2hrs in a night studying. I find anything more is counter productive. Let your brain rest on the stuff. I drank lots of coffee and paid attention in class. I used my 20min breaks to go through my flashcards. I figured if I was going to be stuck there I was going to use the time to study. I did well on my test and my oral. Still in sims but class isn't helping any there.