The Oxford comma has sparked many an internet argument. Everyone seems to have an opinion, and everyone is convinced their way is the only correct way. What really matters is that you communicate clearly. That means reading back over what you’ve written, and since fewer and fewer writers actually do that (and I am as guilty of that as anyone), communication problems can creep in. Personally, I like the Oxford comma and use it always, but I honestly don’t care whether everyone does, as long as their meaning is clear. The full TED-Ed lesson can be found here. -via Laughing Squid
I am, however, all in favor of going back and rereading what's been written!