Internships provide opportunities for students to gain experience in their chosen fields, determine if they have an interest in a particular career, create a network of contacts, or earn school credit. Although you may feel that graduation is still a long way off, if you can gain experience in your chosen area, you will help to reduce the challenge of interviewing post-graduation without any real work experience. Remember there are at least 3 summers as a college student. If you can make use of at least one of them it will put you in a good position when your time comes to graduate.
Travel and experience the world! Broaden your mind and experience different cultures and traditions. From the beaches of Australia to the jungles of Brazil, the memories you gain while travelling are priceless and you just never know who you're going to meet along the way. Go see the world while you can - you have the rest of your life to work!
Volunteer your time for free. This could include working for free for a company related to your field of interest or sacrificing your time to help others (there's no better feeling than helping those less fortunate than ourselves). In the long-term, volunteering looks great on your resume, and it could open doors for future opportunity. Remember to network. This is by far the most important advice to give a student.
Combine travelling and working
Find a job or internship in a foreign country. Perhaps learn a new language. You never know the opportunities that can present themselves.
Spend time with your family and friends
Get some exercise, stay healthy and active!
Whatever you decide, just make sure you have fun and enjoy yourself.