You might be surprised to learn how many students turn in papers with spelling, grammar and punctuation errors that could have been easily corrected by using a spellchecker program or having someone read your paper. Western's Writing Center has tutors and instructors who will read your paper, give feedback, make suggestions, and help shape ideas. They can also meet with you to help you with any stage of your writing. This is a free service for Western students and it's a great idea to take advantage of it.
Another strategy is to read your writing aloud to yourself. You may catch errors when you read aloud that you might not catch when reading your writing. Remember that it is always the students’ responsibility to have papers proofread, not someone else’s.