Here's a hint:
Study insanely intensely using the following materials:
Examkrackers, The Princeton Review, and/or Kaplan
Study by yourself if you're good at that or take an organized prep course if you need it because you're less self disciplined or need additional review.
Do this for about 3 months, take lots of practice tests, review the practice tests.
Get a 30+
Abort if you can't get regularly score 30+ on AAMC diagnostic tests under realistic conditions in the two weeks prior to the test.