As I've mentioned before on these forums, you have to build a life, not a resume. The resume or "profile" should be a byproduct and not the reason for doing what you do.
Focus on things that interest and drive you. Adcoms want dynamic and passionate people - and it's not about picking up a hodgepodge of activities, certificates, or whatever.
There's a difference between participation and achievement - anyone can participate in whatever volunteer activity. But far fewer can actually achieve -- because to achieve anything of meaning or significance takes years of sustained commitment and sacrifice. You can't do that overnight -- and when compared to applicants that have *real* achievements, anything you pick up "for the sake of b-school admissions" will simply look like superficial window dressing.
The best way to get into b-school is to be as accomplished and talented as you can be, period. And that has to come from you, from within - and not from someone else telling you what you should do. You have to figure out what drives you and what you love, rather than being driven by what others say (as kids, it's your parents; as teens, it's your friends; as young adults, its your colleagues and peers, and now it seems t be adcoms, employers, etc).