Spare a thought for the humble comma! So many seem to fire the comma shotgun so that sentences and paragraphs become littered. The poor little bugger is overworked and confused about its role. Primarily its place is in the listing of things which is simple, efficient and easy to remember. There is an omission of the Oxford comma there as it has largely fallen out of common usage. Then you can, if you are so inclined, use it to create a sub-sentence before continuing the flow. Creating pauses, separating speech and quotes are also places where the comma likes to be. Don't just use it because you had to take a breath. Most of all enjoy the freedom to criticise :) Constructively where possible.