I took it a long time ago, so I don't know if this helps, but I remember hearing that about about 20% of the questions are from old exams, so if you have done lots of the old questions from the section where they give you little fact patterns you are supposed to answer, you can bump your score up a bit - I know it helped me. Also, I really doubt there is much you can do to improve your reading skills a lot. If you are reading this, you are probably a scientist/engineer, so approach the games section like you would a physics exam - do lots of problems until you have mastered all 16 or so types of questions they can ask you. I personally would rather spend my time (and save money) doing old exams in books you can buy on amazon.com instead of drive over to some test prep center to get a motivational speach and to hear things you can find out in the books or read online over the internet. It is like college engineering (or science classes) generally - if you do lots of problems, it should become almost automatic. And if you are sure you did bad, cancel the score!
I know this sounds weird, but try to have some fun. If you are taking this test, you are probably interested in intellectual activities (like doing Sudoku) and this test is really just one giant puzzle. Finally, this reminds me of what Robert Louis Stevenson once said to someone who asked him how to be a good writer. He replied that "time is short and I am a busy man, and most of the generalized advice I can give you won't help anyway. Just keep trying until you succeed or fail." If you take my advice above, you probably won't fail.
I hope you do well on the exam and in your career (If you work in one of those high pressure but high paying jobs, take care of your health - that's the best advice you'll ever hear! enough said)
Horse Chute