Remember that most people will feel very comfortable posting here if they do well. In fact, I would be more intimidated if everyone around you was posting low scores.
How you prepare is most important. Everyone's diet and exercise needs are different and so are our methods of preparation. Have you taken a diagnostic test? Do you know your strengths and weaknesses? Do you keep track of what you are actually learning from your prep? Doing 100 problems is good, but what good is it in the final week of your test? Can you summarize your lessons learned in easy to understand, but brief notes?
Keep track of what you are doing. If you are doing the same thing over and over again, you are going to the same results. If things are not working, its time to look hard at what you do and why you do it in that particular way.
There is no easy way out. However, do not underestimate your strengths.
Try to practice with every component of the GMAT. It will keep you prepared. Do not underestimate the easier problems also. Remember, that our mistakes on easy problems cost us the most.
Track your errors obsessively. Resolve to not make them again. Before taking each practice test, look at your
error log. This will remind you of the typical errors you make.
Of all the things that will help anyone the most, discipline is it.
Hope this helps
Praetorian