We are great believers in clear and simple writing. Short words are better than long words. Short sentences are better than long sentences. And short paragraphs are better than long paragraphs.
Clear writing follows from clear thinking. Slow down and take a break. Know what you want to say before you start writing.
Professional authors do not turn in first drafts. They write, then rewrite. Edit. Eliminate unnecessary words. Rewrite again. Spell-check all manuscripts. Before they submit manuscripts, they have others proofread what they have written.