Gaining Relevant Experience
Gaining experiences prior to law school can include volunteer work (can be very important to some law schools, especially those that stress service), internships, employment, work in student clubs or organizations, sports, etc. Activities need not be law-related. Law schools prefer activities that let you develop communication and leadership skills and provide exposure to different cultures.
The professional development activities that applicants bring to a law school are often discussed in the personal statement and interview.