As a project manager now, and as in IT manager at various levels of organizations in my past, I frequently find myself in a position where I have responsibility but little to no authority. I have no direct reports and I write no annual reviews.
Now I have learned over the years how to work with people to achieve a common goal, and more often than not help inspire and motivate (not the same thing, btw) people to focus on the tasks at hand. But it is in many ways more of a challenge than the usual "manager/direct" relationship.
I once bought a book with the same title as this thread ("Influence Without Authority") as I wanted to see what the author said. I know that over the 10 years or so since I bought the book, I have read it twice. The only thing I can remember is the title, which I was very interested in. The author's name escapes me as does anything that was in the book. Clearly, the book itself didn't give me what I was hoping for.
I see practical uses of feedback, one-on-ones and coaching in this "IWA" style of relationships. But I know from my past experiences that subtle variations need to be made to make them effective on those that do not report to you.
I would love to hear Mark and Mike do a cast (or two) on how to adapt these tools to the "IWA" relationship. Perhaps then I would get SOMETHING out of that title that was useful to me, or at least helped me to clarify my thoughts and generate new ideas on how I could improve myself.
And I would love to hear from anyone else as well. Chime on in!