Families ask me all the time if it is more important for a student to be "well-rounded" or the opposite, "angular" - sticking out in one area. I tell them the obvious answer, that it is more important for the students to be themselves. Not everyone is meant to be a leader, but achievement is more than leadership. Finding those activities and interests that bring a student joy will eventually lead to finding a college, a major, a job that is true to who they are and a life that is genuine and fulfilling.
I have my students develop an activity resume, if they have not already done so. It allows them the chance to look at where they have been spending their time when they are not in class or at home (usually doing homework, eating, online, or sleeping - not necessarily in that order). Are there patterns or are there holes in the "fabric of their lives"? Many high schools require as much as 50 hours of community service to graduate. Many colleges will expect it as well. If you haven't yet found the time or the place to get started, you need to give it some serious thought. In what area of interest, local non-profit agency or activity in your community would you enjoy making a difference?