I have to agree, take them in order, if there is one that's really hard, skip it and come back if you have time. Try to get the ones you can answer first and then if time permits go back.
My good news? I took a test on Mon. when I was still in considerable pain from the dental surgery. I didn't study much over the weekend, because I felt so awful and was on painpills most of the time. I tried to make it through school without taking a pain pill and couldn't, so by the time I got to the test, I was a little "high" on the pill. I was sure I did horribly. I just found out I got 29 of 30 correct on the test! I can't belive it. I knew I had done really badly. I struggled taking the test. But wow! I did better on this one than the first one.
Lopevian, I DO NOT reccomend going the same route. Vicodan does NOT make you smarter. I think I just got lucky.