1. Show your story, don’t tell it. If you don’t know what that means, find out.
2. Trust your reader to make connections. You don’t have to spell everything out all the time. You don’t always have to make connections for your readers when you’ve adequately set things up for them.
3. Including too many details about (furrowed, raised, glaring) eyebrows and (licked, puckered, gnawed upon, chapped, sweet, wet, pink) lips, can make your characters seem twitchy.
4. Don’t just write what you think will sell; write the story you feel you have to tell. Either it will sell or it won’t. If you are a writer only because you want to sell stuff you’re misguided. Go sell shoes.