The best way to be great at advertising and marketing is to study everything you can about popular culture! That was told to me once many years ago and it stuck. If you watch what the masses are doing and if you can learn what the "mob" is thinking then you can gain valuable insights into their psyche and become an effective marketer.
Unless of course they are thinking about Britney Spears and her kids.
Seriously though, even that can provide insight into what the average American thinks. to that end our company just launched the Culture Catalyst; a blog that identifies the best and brightest moments in popular culture, as well as some of the worse ones. Check it out here and let us know what you think!