My sophomore year I got involved with the University Honors Student Association as the Social Co-Chair. Our group was small-- there were just about ten students on the board who I got to know very well. In addition to planning events for honors students, I got the chance to participate in fun "board bonding" events, like coffee dates and a dinner at Annie's Parlour (one of the favorite burger and shake joints on campus).
Building leadership skills is just one of the skills you learn being in a student group. You get the chance to lead in a "safe" environment (the mistakes you make don't lead to a loss of corporate dollars or company reputation). Beyond the leadership and resume skills, I've also been able to make really good friends. My Social Co-Chair and I got really close my sophomore year. Although we don't serve on the board together this year, we still find time to get together for lunch and the occasional movie. She's not in Carlson and she is a year older than me, so the odds we would have met if it hadn't been for the student group are slim. I'm happy I was able to meet her and have the great friendship we have now. I've also gotten the chance to grow as a leader. After a year on the University Honors Student Association board, I was elected president of the organization. I took on a much larger role with a lot of responsibility. I've gotten a lot of guidance and support from our faculty adviser, which makes the learning experience that much better.
I highly recommend you join in a student group (or two, or three!) of your choice on campus. Whether you're looking for something academically enriching, or just for fun (you can join clubs for ballroom dancing or martial arts to something related to your major or college) it's just so much fun to get involved!