Writing groups are good for telling you where you wandered off the path, when you are unclear, and which characters are weak. But grammar and punctuation should be second-nature. If they’re not, you’re in trouble. Nothing bothers an editor more than someone who seems to have no command of the language. It’s a red flag that the writer is not a real writer but a wannabe writer. And I see that all the time—writing that could be really, really good, because it comes from the soul, and then the writer falls down with the grammar and punctuation and sentence structure. The kernel of truth is lost in the mess of it. We writer-educated people pay homage to Strunk and White’s Elements of Style by keeping it close by, even though, if we read a lot, we instinctually know how to do it.