Definitely take 2-3 more tests between now and test day, but not any more than that, and make sure you take the day or two between the big day off.
At this point in your studies, everything you do should be timed. Don't try to really learn any brand new content, because you probably won't have time to fully absorb that material; rather, focus on mastering material you've already learned well.
Finally, keep your eye on Test Day, but don't let it get to you. The GMAT is a tough test, but you can be one of the thousands of GMAT success stories out there.
Prepare with Kaplan and save $150 on a course!