If you are getting 170+, its time to time yourself. I was getting 179, 180 on the practice tests, but I'm a slow reader. On the real test, I ran out of time on the last reading comp section, guessed "c" for the last 7 questions and got them all wrong. Time yourself.
Do what I did. Lock yourself in a room every day and take a practice test. Do some timed and some not timed. Make sure that you review all of your answers to understand why you got something wrong. You have a lot of time before the test. You score will improve if you practice.
Agreed. The first practice test just jolts you into realizing that you need to practice. I got a 154 on the first practice test, but ended in the 99th percentile for the real thing. Take the practice test. Accept that you currently suck, but through hard work can get better.