Content marketing will definitely put you on top. As it is the ability to produce useful and entertaining information that is worthwhile on its own, but that might also be useful towards a sale and search engine optimization.

There are plenty of eBooks, studies and surveys on the benefits of blogging for businesses. And one survey receiving a lot of blog posts and Tweets at the moment is that of HubSpot (creators of the popular Website Grader SEO tool). From their data of over 1500 businesses they found that those with blogs attracted:

• 55% more traffic
• 97% more inbound links
• 434% more indexed pages

Source: http://copywriterscrucible.com