Remember when you're at your undergrad school....that GPA matters. While I was at CGA we had a saying (you may have the same saying).... "2.0 good to go". Yes, that says applies to getting through the academy and getting your commission, however that will not help you later in your career. You WILL need grad school if you intend to stay in your service past O-4, grad school is a good idea for that promotion board. I'm applying to grad school at GWU right now, and I'm realizing how much easier it would be for me had I worked harder for a higher GPA.