Maintaining a clear focus is one of the most difficult challenges faced by writers of informative essays. Even when dealing with the most obscure subjects, the amount of information available to writers is still likely to be so large that it can be difficult to decide what to use and what to set aside. As you review your essay, make sure that your draft focuses on a single main point, that your thesis statement clearly conveys that point, and that every supporting point is relevant and well defined.