Developing interpersonal skills and career related practical knowledge , also its good if you excel in any part of your studies .have some specialization . today's job market are expecting only persons practical knowledge than academic . be up to date with your course and its future scope ..
i think you are asking about what are some good things to do during student life...
we can join in Non Profit Organizations and do some social activities,
we can learn any music instruments
we can offer help to old age homes / orphanages in our city
drink lots of water while you are studying..
having a good daily routine.. and.. sticking to it :D
do as many things as possible on a day.. try to postpone as less things as possible..
have enough free time to spend with family and friends..
eat healthy.. :)
Volunteer time in an unpaid internship, or paid internship. As long as it is in the career field you are choosing.