I spent a good two months solid teaching test-taking skills to my students. Here's my method with the NREMT test:
1. If you aren't comfortable with computers, take the paper test!
2. Get a good nights sleep, eat a good breakfast (meat, etc).
3. Arrive early, don't cram!
4. Read the question twice.
5. Read all of the answers.
6. On standardized tests, there are usually two right answers, one trick answer, and one totally wrong answer.
7. Eliminate the oddball wrong answer.
8. Eliminate the "If I skimmed through the text I might think this is the answer, but it clearly isn't answer."
9. Of the two remaining, select the most correct answer.
10. Only change your original answer if you are 100% sure that your new answer will be correct.
11. I don't know if they allow it on the computer, but if they do, when you're done I'd check back over each answer to confirm that it is correct.
Test taking is mostly knowledge, but I'd say a good 25% if it is learning how to be a good test taker.