Take a review course, such as those offered by Kaplan or Princeton Review. These courses, some of which charge substantial fees, may be ideal for students who lack the discipline to study on their own.
Purchase the most recently published LSAT review books; these will contain up-to-date practice tests. Every LSAT test is different, but the key is to understand the metrics of the test, practice test-taking and familiarize yourself with the time constraints. The point of practice is to decrease the time you need to complete the questions while achieving the highest possible score you can. Each test takes approximately four hours.
Be serious about studying for the LSAT. Set aside at least an hour daily to study and take a practice test once a week. Do not sign up to take the test until you feel prepared. Most students begin to prepare at least four to six weeks before the testing date, according to the University of California-Berkeley Career Center.