The main thing seems to be the confidence factor. With a month left, focus on confidence-building.
For verbal, try to get an LSAT review book and do some of the practice problems. They're harder than GMAT problems, so if you can tackle those, you'll be doing well for the GMATs.
Download the GMATPrep software from mba.com. It's different from PowerPrep but there are 2 free CATs there.
Make a study plan that lists the areas where you have been struggling, and go through timed practice problem sets, then spend some time after each set reviewing why you got problems right or wrong.
And believe in yourself. You can crack the GMAT. All it takes is studying and confidence.