Here is a super brief presentation I gave at the content marketing meet-up at Scoop.it on 11/26/2012.
For more details on each of the slides, here is a blogpost about "5 Most Important Writing Lessons Learned after Pivoting our Blog twice", I hope it's helpful too:
http://blog.bufferapp.com/5-key-lessons-we-learned-from-pivoting-our-blog