Dr. Robert Lahm, Jr. (Associate Professor of Entrepreneurship with Western Carolina University) looks like he may have organized some links and resources on consulting here. There are a number of blogs listed along the right hand side of his web page, a number of which I have never covered on this blog before.
Additionally, about midway down the page there are some links on "Consulting 'How To'" and "Starting a Consulting Business". In the "How To" section, Dr. Lahm not only references a popular post of mine on client facilitation skills but also provides a presentation on "Consulting Basics (Class 2 Slides)" (note PPT). That Powerpoint presentation sheds even more light the importance of soft stuff in an engagement. It also provide some concrete advice on the cadence of a (desirable) consulting engagement.