Well,
I took the old version back in the summer of 2002, but I suspect that this advice still holds true. A) Don't freak out about it, a decent high school education will set you up for success. B) Work fast. Don't get wrapped around the axle if you don't know a question. I think that too many people spend too much time on the spatial orientation questions. Work through the section answering the ones that you can figure out rapidly, then go back and take acrack at the more difficult questions.
Hope this helps.