Bonuses that I should've included before:
-Make sure not to be afraid to use repetition for emphasis. When used intentionally, repetition can help make a point or create certain feelings
-Treat characters like real people. How do you think they would react to something with their personalities and knowledge in mind? How would they interact with others?
-Don't be afraid to have variety and good representation in your cast! Representation can help others feel good and if every character looks the same or acts the same, that's a bit boring and possibly confusing.
-Cats. Have them somewhere, somehow (this is a joke rule btw)
-When taking breaks, think about the media you consume (books, shows, webcomics) and what makes them good or interesting. Use those good aspects and put a spin on them to use in your story.
hope this helps!