He writes extensively on the importance of physical movement, specifically the "miracle" of walking, which he credits for maintaining mental clarity. The letters argue that you cannot write persuasive copy if you are sluggish, sick, or mentally foggy.
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: Halbert urges students to maintain a "swipe file"—a collection of proven, successful ads to study and mimic. Life Lessons & Physical Discipline Copywriting advice for beginners - Blog He writes extensively on the importance of physical