The best form of advertising today? Make it easy to get access to what you offer, and people will buy it if you make that possible. The two are related - you not only have to make your product accessible, you really have to make it buyable, too. Witness the Monty Python experience:

And you know what? Despite the entertainment industry's constant cries about how bad they're doing, it works. As we wrote yesterday, Monty Python's DVDs climbed to No. 2 on Amazon's Movies & TV bestsellers list, with increased sales of 23,000 percent.

Your product is the advertising. "Clever" writing, social media - those are all things you use to make people aware of your product. In the end, either it can sell itself or it can't.