Double check your foundation: The GRE is full of basic and medium level questions, specifically in algebra, geometry, and data analysis. Go back to some notes from high school, or hit the library to fill in any holes in your foundation. It’s a lot easier to relearn what you already know than to try and learn entirely new concepts in a limited time frame.
Study the test: Get to know the sections and time limits of the test. If you already have an idea of each section, the directions, and question types, you can do more skimming and less explicit reading. Knowing what to expect will make it easier to face when the time comes.
Strengthen your weakness(es): If you know your vocabulary isn’t the best, or algebra isn’t your strong suit, focus on trying to bolster those skills. If you focus on raising your score in one section, rather than practicing concepts that you’re already pretty good at, you may see greater results.
Relax!: When the test rolls around try to avoid cramming and stressing yourself out. Breathe, hit the gym, or do some yoga. At this point, you know what you know and you don’t know what you don’t. The best strategy is to go into the exam with a clear head.
May the odds forever be in your favor - Break a pencil !