I see too many people go into the LSAT immediately after their course with high expectations; however, they don't get the score that they desired. Why is this? The answer is simple.
Taking a course does not guarantee a high score on the LSAT. It merely lays a foundation of strategy and technique.
Consider the analogy of studying for the LSAT to learning a new language. Learning the language's grammar and vocabulary is not enough to become fluent. Fluency will only be achieved after endless practice of what you have learned by engaging in conversations with other speakers of that language. This is very similar to the LSAT. Just because you know how to solve an LSAT logic game by making the most perfect diagram does not mean that you can solve four logic games in 35 minutes on test day.
The real learning comes
after the course. Ideally, you should take at least five LSAT PrepTests per week. This reinforces learned strategies while ensuring that you can, in fact, succeed under testing conditions.
Tests must be taken under actual conditions, meaning that you should have someone proctor you to strictly enforce time constraints. Because I had no LSAT friends when studying, I used
SimuGator's LSAT Proctor DVD which turned out to be a great investment.
All of this is not enough though. Don't just take the tests, grade your answers, and move on. You need to spend about 10 minutes going through each wrong answer. Read the question again and review the answer choices. Write out a paragraph about why the correct answer makes sense; pretend you are trying to explain the answer to someone who was not familiar with the LSAT.
It is only through endless LSAT PrepTests and tedious analysis that you will see some serious improvements in your score.