Many manufacturers secretly question whether advertising really sells their product, but are vaguely afraid that their competitors might steal a march on them if they stopped.

The worst fault a salesman can commit is to be a bore. Foster any attempt to talk about other things; the longer you stay the better you get to know the prospect, and the more you will be trusted.

Never stop testing, and your advertising will never stop improving. Testing was used in advertising decades ago. The internet has made testing so easy that every online marketer can use it to improve advertising results. Google content experiment is a free tool for you to do split testing.

David Ogilvy made his copywriters come up 100 different headlines for every ad they wrote.

I did not feel 'evil' when I wrote advertisements for Puerto Rico. They helped attract industry and tourists to a country which had been living on the edge of starvation for 400 years.

The business community wants remarkable advertising, but turns a cold shoulder to the kind of people who can produce it. That is why most advertisements are so infernally dull.... our business needs massive transfusions of talent. And talent, I believe, is most likely to be found among nonconformists, dissenters, and rebels.

Never write an advertisement which you wouldn't want your family to read. You wouldn't tell lies to your own wife. Don't tell them to mine.