are you talking about content, search, something else? you make it sound way too easy, but thanks for sharing.
I have to agree with the OP. My success has come from direct linking to the product page. I don't buy that whole create your own landing page. I have a couple campaigns going straight to the product page with a quality score of great "Great" and a max big of <.10. I tend to stick with products I know best, which are things your typical college student would purchase. That is one of the biggest tips I can offer. I have tried running campaigns for products that I know nothing about and our targeted way out of my own, I just cant seem to get them to perform.