Okay, not the most exciting title I've ever given to a blog post, but this is good stuff: The Biggest Mistake You Can Make When Submitting Your Work.
There's actually several good pieces of advice in the article. It reminded me of hearing that the problem with entering writing contests is that a lot of work is submitted because it's the deadline, not because the work is ready to be submitted. I've probably done that a few times myself over the years.
H/T to Aerogramme Writers' Studio on FB for the link.