Advertiser David Ogilvy has recommended everyone read the book Writing That Works at least three times. The authors’ main tip is that when you know what you want to write – just write it. The one who mumbles gets less attention than the one who speaks in plain language. To get busy people to act, your text must go to the heart of what matters. Most of the texts are unclear, carelessly written and confusing.
A Brief of the book can be read here