http://www.businessinsider.com/a-guide-to-proper-comma-use-2013-9
13 Rules For Using Commas Without Looking Like An Idiot
13 Rules For Using Commas Without Looking Like An Idiot
Contrary to popular belief, commas don't just signify pauses in a sentence.
In fact, precise rules govern when to use this punctuation mark. When followed, they lay the groundwork for clear written communication.
We've compiled a list of all of the times when you need the mighty comma.