Another area that is butchered in the online space, especially in social media, is grammar. While you may not think it is important in the larger scheme of things I would beg to differ. I see common grammatical errors every day and they make me cringe.
Apparently the folks at Copyblogger have had enough as well. They, along with the BlueGlass infographic team, have put together a helpful chart to help you avoid looking like you may be a bit under ed-u-ma-cated. Enjoy.