Never write an advertisement which you wouldn't want your own family to read. You wouldn't tell lies to your own wife. Don't tell them to mine. Do as you would be done by.
David OgilvyI had a friend who was the King's surgeon in England. One day I asked him what makes a great surgeon. He replied, "What distinguishes a great surgeon is his knowledge. He knows more than other surgeons. During an operation he finds something which he wasn't expecting, recognizes it and knows what to do about it." It's the same thing with advertising people. The good ones know more. How do you get to know more? By reading books about advertising. By picking the brains of people who know more than you do. From the Magic Lanterns. And from experience.
David Ogilvy