Understand what the test purports to measure. It is not content-based, but rather is designed to assess your ability to read and comprehend complex text and organize and process information to reach conclusions, along with testing your speed and accuracy.
Practice, rather than study. Many Web sites, including the Law School Admission Council, offer free downloadable sample tests and other prep materials.
Investigate the many test prep resources available online and at local bookstores. These range from books to CD-ROMs and audiotapes.
Develop a test-taking strategy. Like all such examinations, the LSAT is a timed test with a known scoring system. Discipline yourself with practice tests to allocate your time appropriately.
Study vocabulary, if you absolutely have to study something. Since all components of the LSAT rely on reading comprehension, you may be able to improve your score by expanding your knowledge of common test words (and there are lists available).
Take the test. Many students take the LSAT more than once and consider early test experiences the best preparation for later ones. Although the Law School Admissions Council has access to all scores, and multiple scores are averaged, your later, higher scores will raise your average.