Pick a prep course. Consider which options are timed well with your preferred test date before you register. You can compare your options online with most prep course providers and see what other prep services the company has to offer.
Sign up for your course. While most prep companies request that students register online, it is worthwhile to call the local center where you will be studying to confirm your registration, or to register over the phone.
Take a pre-test. As a part of the registration process, test prep centers will likely ask you to take a test to check your current abilities. You should be able to track your progress against the score you receive on this test.
Get your registration materials. Depending on the prep course you sign up for, you may receive your class materials through the mail, on the first day of class or by going to the test center to pick them up before your course begins.
Check the class time and date, as well as what you need to bring to class with you by calling the test center. LSAT prep courses rely on students to be aware of their own responsibilities.
Take a look at the two largest companies offering LSAT prep courses in the United States: Kaplan and Princeton Review (see Resources below). Both offer online sign-up options for their courses.