Half the money I spend on advertising is wasted, and the trouble is I don't know which half

Half the money I spend on advertising is wasted; the trouble is, I don't know which half.

Time is money. Wasted time means wasted money means trouble.

The most common trouble with advertising is that it tries too hard to impress people.

Advertising is the art of convincing people to spend money they don't have for something they don't need.

Let advertisers spend the same amount of money improving their product that they do on advertising and they wouldn't have to advertise it.