tl;dr: Use LLMs as copyeditors, not ghostwriters, following two rules: never use an LLM's suggested wording (readers detect it instantly), and disable its default encouragement (which tricks you into keeping bad first-draft choices). Instead, have models flag mechanical problems—passive voice, filler words, structural issues—then rewrite yourself, and have a context-free model judge between versions to avoid sycophancy bias. The author also recommends the book "Style: Lessons in Clarity and Grace" for systematic prose editing.