Choose a major that interests you and in which you can excel. This includes a major such as political science which offers a number of classes that mimic what is offered at law schools. Choose courses that work on logic, writing, research, and communication (written and oral). These are skills that you need for the LSAT and to succeed in law school. Take rigorous courses. Law schools look at your courses and want to see that you've worked on skills and taken a challenging program.
See the pre-law advisor Dr. Latimer for recommended courses and feel free to see him before you meet with your advisor during the course sign-up week.