While most law schools don’t have any course prerequisites, there are classes you can take as an undergraduate student that will better prepare you for both the LSAT and law school. Tara Kuther with About.com suggests that students take the following courses as an undergraduate:

Public Speaking
Accounting
Economics
Philosophy
History and Government
Composition and Literature
Psychology
Sociology
Political Science
Religion
Logic
Expository Writing

Beyond these courses, Kuther also suggests that students take several writing courses where your essays are critiqued by professors and other students. Writing is an integral part of law schools, and students should be well prepared by being able to write efficiently and coherently and be able to follow standard grammar rules.