1.Frist, use the grammar checker on your word processing program to check for simple grammar errors. Most grammar checkers now look for comma usage, run-on sentences, passive sentences, tense problems, and more. Using your judgment and the grammar checker’s suggestions, edit your essay. But here you should be aware that creative writing commonly deploys a variety of writing skills and techniques that intentionally breaks the rules, such as run-on sentence and etc. So you need to judge on sentence by sentence basis.