I enjoyed this article as it discusses some of the common issues/psychologies of content marketing and the perseverance needed to see it through to success.
Content marketing is hard work. Developing (and documenting) a strategy; actually writing blogs, articles, infographics, video scripts; and distributing them through email, on your own blog and with a paid push all takes time—at least six months, according to most.
http://www.scribewise.com/blog/truths-about-content-marketing-and-the-trough-of-disillusionment