Make sure you get top marks in those classes this semester.
Hoping's not enough. You need to train like you fight. First thing you should do is fix all of your spelling and syntax issues in your typed word. Yeah, I know it's a forum, but if you get into bad habits, they will betray you when you go to sit for the PCAT and/or the interview essays at schools. Don't be an obstinate fool and claim that because it's the internet it's OK to type like you're a 3rd grader. It's not. Train like you fight.
Yeah, running for leadership would help tremendously. It's one thing to be a card-carrying member of a club... Anyone can pay dues and make that happen, right? Show some extra involvement, go the extra mile, and have something worth the ink on your PS. I suggest looking into Red Cross and Salvation Army chapters in your area, as they often need extra hands for any number of things. Soup kitchens are also a great place to help the community and, of course, pad the application.
There are awesome ideas on this forum as to what you can do to clean up your application and make it a shoo-in, so I suggest you use the search function and check 'em out. Lots, and lots, and lots of students have come before you on SDN and there is a wealth of knowledge here. Soak it up like a sponge, and who knows, maybe you'll be able to help someone else later?