Internships are fine, but not the only possibility. Work in a new city. If you get the chance, talk with lawyers and others about the nature of legal education and the legal profession. Talk with members of the faculty Pre-Law Committee or the Career Services staff about your future goals. Consider at least a semester abroad.
Law schools are more than eager to have students who have seen the world beyond our borders.
Get a genuine fluency in a foreign language. Pick an area of the world of special interest to you. Read newspapers, follow the politics there, and think how the future of that area will relate to the future of the United States. Plan your major courses for the next two years. Leave room for electives that will emphasize reasoning, communication, and writing skills.