Hey so I would definitely consider myself an "underdog" and was accepted for fall 2011!! YESSSSS...
Anyway, I saw a lot of questions as far as ECs go so I thought I would share the advice that helped me.
I'm from Utah and the University of Utah (MD school) has ridiculous minimum requirements for ECs to even apply. Because I always thought I would go there, that's what I gauged mine on. As a result:
I have over three years of research experience in organic chemistry, cardiovascular genetics and neonatology.
Over 70 hours of physician shadowing (MD and DO, multiple specialties)
Over 600 hours of patient exposure (I worked as a medical assistant for an internist 40 hours a week for a summer).
I also volunteered for 4 hours a week for a year at the local free clinic for the homeless.
I also managed to squeeze in rock climbing, skiing, raising my daughter and finishing my degree in 4 years. It was busy, but I did it. It can be done.
I don't have the highest grades but I think I come off as more well-rounded than the average applicant- which is what gets most Utah undergrads into medical school.
So, if you're interested in shooting for something similar go to medicine.utah.edu and check out their applicant page. If you meet their minimum requirements you will look excellent to any school in the country (at least as far as ECs go). But an important side note: if you want to be a DO, you HAVE to shadow a DO to have a fair shot of being accepted. period. you should also want to shadow a DO so you can confidently talk about the differences in osteopathy and allopathic medicine in your interviews and essays (you will be asked and are expected to have an excellent answer).
Hope that helps, best of luck to everyone!!
If anyone's curious:
GPA: 3.45 sGPA: 2.9 MCAT: 29