@Alejandro I'm sure I could improve much more by June, but then I would miss all of the application deadlines for the Fall of 2016. I don't want to wait an additional year to start a program.
It is on the bottom of every application I filled out under (i believe) the education section. It says list all academic honors, awards,achievements, etc.
@eddySH84 I'm actually part of the hybrid program at my school (which means I'm full-time, but I take classes with the day sections and part-time sections). If you have any specific questions I can ask my fellow colleagues in the part-time section!
I don't think it was necessary to ask permission to have look around the campus, but once they've invited you, it is a great opportunity to learn more about the school, esp. the specific program you are interested in.
Thanks all for the motivation and good counsel - the community here is definitely one of the best parts of this program. @"Nicole Hopkins" - Believe me, I would love to! Northwestern is one of my top target schools.