Is there such a thing as too musch studing?

[sgloer]

the important thing is to read the explanations every time!

Ditto. Make sure you're studying the explanations; if you just focus on the blanks, you could be missing critical information for the test.

Also, as others have said, the Petersons sample tests are a great way to gauge your progress, but more importantly, what you learn from them can boost your score by a few points.

Good luck!