I once heard a professor of English say, "Commas are a complete mystery to me, so I just leave them out." At the other extreme, almost all of us have heard at least one time or another, "Every time you take a breath, put a comma there." If you do not want to avoid commas completely but also want to avoid complete comma saturation, here are a few guidelines that will help you decide where to put that confusing little squiggle.
You can use commas to separate clauses in a single sentence. If you want to combine two independent clauses, use a comma followed by one of seven conjunctions (and, but, or, for, nor, yet, so).
4) Non-essential Elements