7 Use regional dialect, patois, sparingly. Once you start spelling words in dialogue phonetically and loading the page with apostrophes, you won’t be able to stop. Notice the way Annie Proulx captures the flavour of Wyoming voices in her book of short stories Close Range.
8 Avoid detailed descriptions of characters, which Steinbeck covered. In Ernest Hemingway’s “Hills Like White Elephants”, what do the “American and the girl with him” look like? “She had taken off her hat and put it on the table.” That’s the only reference to a physical description in the story.
9 Don’t go into great detail describing places and things, unless you’re Margaret Atwood and can paint scenes with language. You don’t want descriptions that bring the action, the flow of the story, to a standstill.
10 Try to leave out the part that readers tend to skip. Think of what you skip reading a novel: thick paragraphs of prose you can see have too many words in them.
Writing Tips: Elmore Leonard’s, 10 Rules of Writing