Studying for the lsat can be a big pain, which is why choosing from good lsat prep courses is important. The practice tests should have different enough questions to cover most all the possible questions that could be on the actual test. A good lsat prep course should also help you understand the twenty or so core concepts upon which most of the questions in the actual lsat exam are based. This will allow you to get a much better score. Of course, the more popular lsat prep courses are the kaplan course and the powerscore course.