The thing that stuck in my head about his explanation of branding is the notion that the audience has so little room in their memory for your brand, that you had better distill your core values – things that your brand believes and will never stop believing – into a concise message that you apply consistently.
Some of the other rules of advertising he lays out, Apple would go on to break in the next 15 years (or so). The famous “I’m a Mac” campaign was devoted entirely to talking about Apple’s rival, Windows.