The LSAT Writing Sample asks you to write an essay in 30-minutes. The LSAT Writing Sample is not part of your LSAT score. In fact, no one will actually grade it. Instead, the essay section is used by law school admissions officers to evaluate your "real" writing.
It is wise to invest a few hours in preparation for your essay. Those who don't prepare at all often write terrible essays. These essays might even be bad enough to endanger a student's admission chances. Spend a few hours looking at sample essays to avoid any unnecessary mistakes.
Basic Tips:
1) Read the topic carefully and spend a few minutes organizing your thoughts before you begin writing. Make a list of pros and cons for each point of view. Then pick the side that you can best support. Discuss both sides of the issue in your essay.
2) There is no right or wrong position on the writing sample topic. You are not required to have any special knowledge on the topic. Law schools are primarily interested in how skillfully you support the position you take.
3) You write the essay after finishing the test. Use the scratch paper and try to stay focused even though you will be probably be mentally exhausted. Once you finish the essay it is all over!
4) Watch egregious typos and spelling. If you are unsure of the spelling of a word, use another.
5) You only have 30 minutes to write your essay. Pace yourself. Take a few minutes to set up your essay at the beginning and make sure you have a few minutes at the end to proofread your essay to catch any embarrassing errors.
Try a sample essay