New writers often suffer from inflated prose that is excessively long. Remember that description can slow action. A rule the author suggests is tht if a sentence doesn't advance the plot, illuminate character of motive, or clarify the action, consider reworking or deleting it. Be careful when choosing your diction. Don't rely on a thesaurus.
Clarity is a virtue.
Watch out for words that may suggest more than you intend, or ones that have negative connotations. Use vague words like felt and seems as little as possible.