Once you have completed what looks like a finished product, you can search for grammatical errors and problems with word choice or punctuation. In other words, you can fine-tune it. It is always a good idea to read your paper aloud to yourself. You are more likely to hear an error than see one. You might have someone else go through it as well, in case there is something you missed. Everyone misses things. This can be done by a friend, classmate, or the Writing and Learning Commons.