I'd wanted to be a trial attorney since I was about 13 years old, so at an early age I made it my goal to get into law school. My inspiration was being able to participate in a Mock Trial program in my middle school, and that inspiration never died out. Through high school and undergrad, I made it a point to improve my writing (something I always enjoyed), and to delve into whatever subject(s) interested me, without worrying about whether it would be a 'marketable skill' at some point down the line. I think my wide range of experiences really helped once I got into law school and started becoming more involved in classes and extracurricular activities.
Firstly, public service work is the most immediately rewarding. Not only are you helping people regardless of which side of the aisle you stand, your impact and involvement in their lives is present from day one. Particularly in criminal law, the processes move at lightning speed, and there is no time for waiting around or getting your feet set. Second, trial work almost never comes to those who wait, and in almost any other sector of the legal field, one is required to wait before getting into the courtroom. But in public service, you are given real responsibilities and an opportunity to prove yourself as a lawyer--even while you're still a student. That's an opportunity I couldn't pass up.
Fittingly, my favorite and most rewarding law school activity is and has been Mock Trial through Barristers' Council. My closest friends are part of Mock Trial, and it has taught me so much about trial work, the law, storytelling, and confidence that I get to bring to my current internship. Being Vice-President of the 2015 Class has developed my leadership and public speaking/outreach skills, and has further stoked my passion for service. Finally, Law Review has been a tough, but often valuable, means to improve my legal thinking and writing in a student-driven initiative. Being a public servant requires knowledge of the law as well as empathy; these activities allow me to develop both of these aspects of my professional character.
If you're sure you want to be in public service, make sure to not limit yourself in your opportunities or believe that certain activities are just not the "right fit" for someone interested in public service. Truth is, all experience is good and valuable experience, and will help your clients in the future. The law is a fascinating, but broad subject, and the more you know, the more effective you can and will be.