Errors

I hate spelling and grammatical errors, but of course it will happen to me. I just realized it did. So, forgive me. I do consider myself a "grammar nazi." And if you don't know what that is, here's a helpful definition. Or definitions rather. http://www.urbandictionary.com/define.php?term=grammar+nazi

But yes, proofreading. It's a great thing to use, especially if you're submitting something numerous people are going to see or essays etc.