Write Clearly, Write Concisely, And Write Correctly
Some would-be writers think they can dash off an article without learning the basics of grammar. Just as any craftsperson spends time honing his skills to make the perfect piece of craft, so must a writer work hard to write an error-free, grammatically-correct article. True, some errors are typos, but this reflects a certain laziness on the author's part. A writer should closely examine his article before sending it off.
Don't trust your spell checker. No automated spell-checker can alert you to every error. Whose and who's, lose and loose, quiet and quite, its and it's are all legitimate words, but your spell checker won't underscore them in red as potential style usage errors. Spell-checkers are not clever enough yet to tell which word you meant to use. And if the error is not due to a typo, it means you need to consult a dictionary to check any uncertainties.
Remember using a word ending in " 's" means there is a letter missing. "It's" means "it is." If you are unsure which one to use, try saying the sentence both ways.