Another recommendation:
For schools that receive a large number of applications, you won't even be looked at during the main review based on your scores. At my university once all of the applications are in, they sort by GPA & GRE scores before sending out a list of applicants to professors for review.
To avoid this: E-mail professors left and right. They aren't going to see your application when it comes through the main review cycle, so you need to e-mail them far ahead of time, so that they are looking for your application. This is where your years of experience come in. Write an amazing introduction e-mail to POIs, and try to get a conversation going to make them excited for your application at least 3-4 months before the application deadline. Once the conversation is going, you can tell them all about the amazing projects you have done since graduation.