"You use commas when you list things, and, uh, when you want to take a pause?"
Sound like you? Don't worry, that's how nearly every English speaker feels.

I can teach you the actual rules of comma usage, as well as the guidelines - because there are places where commas are required and places where they're optional.
After this lesson, you'll be able to form your own opinions on the use of the Oxford Comma and sound like a real intellectual!

Add onto this service by getting the semicolon explanation as well - much of the base explanation is the same, so you can master both in an hour or so.