I'm surprised the author didn't talk about using inbound marketing techniques such as articles, infographics, whitepapers, ebooks etc<p>I've also got mixed feelings about "retargeting". On one hand, it's great because it keeps your brand omnipresent. On the other hand, it can really bug the hell out of existing customers. For example, I'm an existing Grasshopper subscriber but their insect ad keeps following me everywhere. I wish I could squish it!