Write an article based on this "Get feedback. Put away your writing for a few days. Make changes to your theme."
Allow lots of people read your writing. It is helpful to get other eyes on a piece of writing so that you know whether your ideas are conveyed clearly. Ask these readers about their impressions. See if they can identify your theme without prompting.  Be open to the ways that other people respond to your writing. They might be able to point out errors that you regularly make, which can help clarify and improve your writing. They might also ask thought-provoking questions that helps you consider an angle you hadn’t previously considered. Remember that this feedback is not intended to be personal; they are responding to the writing, not to you. Get some distance from your writing by putting it away for a bit. Sometimes when we write, we’re so invested in the story and shaping the words that we lose sight of the bigger picture. Take a break from your writing by turning your focus to a different project for a few days. Then come back to your writing and reread it. Based on your own evaluation of the piece, as well as the feedback you’ve solicited from others, make alterations to your theme. You may recognize that, while you thought your theme was one aspect, your readers interpreted it very differently.  For example, perhaps you have been focusing your theme on a firefighter’s triumph over her parents’ disapproval. But then you realize that your story is really about the firefighter’s struggle in a male-dominated profession.  A change to your theme might necessitate adding or deleting some passages that do not strengthen your theme.