What's the management equivalent of shooting yourself in the foot?

Patrick McKenna's "Hurdles to Executing Your Strategic Plan" at Slaw.ca. "Hope is not a strategy," writes McKenna. Neither are good intentions, good ideas, or even good karma. But even when you have a solid strategic plan, one that articulates realistic, measurable objectives and the steps required to achieve them, the real world is going to throw countless unexpected (and unforeseeable) obstacles into your path. So the last thing you should have to worry about are the internal hurdles to executing your plan. McKenna's post outlines the most common of those barriers, and provides valuable advice on how to work through them.