10 flagrant grammar mistakes that make you look stupid

Sending a less-than-perfect e-mail to a friend is one thing; mistakes aren't really a problem. But if you want to craft an error-free message that reflects your professionalism, be on the lookout for these common grammatical slip-ups.

Here's a fact of professional life: Your documents and online communications need to be competently written and free of mistakes. And here's another one: Even the least grammar-sensitive people are going to notice if you carelessly use "it's" when it should be "its" or "effect" instead of "affect." So along with spell-checking, add a little proofreading step to those communications that really need to be perfect. This list will help you zero in on the mistakes that are so easy to overlook.This download is also available as an article. Join the discussion and share your suggestions and opinions.