Hussain's comments are totally on the ball. Once you have the minimum GMAT score you need for the school (okay yeah it might have been better to get more, but we don't live life in the hypothetical), you just gotta go for your dreams (with the caveat of having a well-prepared overall strategy). And yes, you can get into strong tech programs. Haas, Tepper, and Anderson are some of the strongest in the US. And ultimately the school will choose you based on so many things other than the GMAT, including of course the stories!
So how to get the most out of your application? If I could answer this in one phrase, I'd be out of business
But a few good places to start:
1. Write from the heart - never forget that there are PEOPLE reading these essays. People with minds and feelings and ideas. And if you reach out to the person, your stories will always be stronger
2. Strategize your application - Heart is great, but not enough. Keep in mind that they are business schools. They want success, just like you do. Play to their needs and expectations.
3. Emphasize the uniqueness - Inevitably with soooo many candidates, one thing that will work very well is to STAND OUT. So do what you can in your application to stand out from the pack.