There is no set of courses comprising a pre-law concentration. There are a few central rules. Choose a major that interests you and in which you can excel. 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 for recommended courses and feel free to see him before you meet with your advisor during the course sign-up week.