The scores are scaled, similar to how the GRE is scored, so it will be somewhat difficult to figure out the scoring on your own. The practice test should tell you how to figure out what your scaled score would be, I think. If you haven't already picked up a test prep book, I highly recommend it.

Here's another resource. And, this one.

As a former test prep teacher, I can offer these tips... Just remember: Use the process of elimination to increase your chances of selecting the correct answer. Skip the more difficult questions, but come back and answer them at the end - don't leave any answers blank. You don't lose points for wrong answers, so statistically, you're better off choosing the same letter every time than randomly selecting a letter.