If I remember correctly, OMM had a review or 2 on the shared drive and I used that for the OMM part of the boards and for my final exam. DMU basically hammers the OMM stuff into your brain over the 2 years so I only skimmed over it a couple of days before I took the board.
Ethics SPAL made me freak out but you really don't need to. It's mostly a situation in which you have to figure out what to do and what to say. there wasn't a right or wrong answer to how you handle the situation, as long as you don't flip out on the patient, or cuss, or hit someone. haha j/k You will be graded on that you went in there, handled the situation and now you have experience with it. Just go in there as a professional and you'll be fine. I've actually been in several situations like the ones we had for our ethics spal since 3rd year started and it's really not that hard.
Studying for boards: I studied in between regular exams while school was still going on. I usually went over what we were going to go over in Kaplan. But I didn't try to cover all the material, just a little. Then I took off 1 whole month before I took the exam and studied from 8am until midnight every day. I took several breaks throughout the day and left one evening a week to myself, no books. I made a schedule and stuck to it.
For the last weeks of 2nd year hell, where there's only one test per class and it feels like everything is weighing on your shoulders, yah, I have no advice but to keep up with the material, use Class du jour on Parade to study with and most importantly go to class. I skipped a lot during the first semester but at the end of 2nd year I found if I went to class and studied the highlights while in class I felt like I actually remembered stuff better when I looked back over it later. It's hard, you'll make it through, don't give up.
Just remember, there's a light at the end of this tunnel, it may be pinpoint right now but it'll get brighter! Your 3rd year will have it's ups and downs too. I've had rotations where I worked like a mule, and there's rotations where you can take a nap at noon b/c you're already home for the day. You guys can do it!