Some people talk about focus as if under-focus is always the most important problem, but, in reality, the dangers of over-focus also exist. First, over-focus prevents you seeing awful threats and beautiful opportunities. Second, over-focus makes people think that they already have the solution to everything, and stops them looking further. And third, over-focus can mean under-lived and under-experienced.
1. Over-focus hides opportunties and threats
As Mike Lehr puts it "business literature emphasizes focus: set goals, plan, and then focus on execution. However, it’s relatively void of focus’ downside: obliviousness to peripheral threats and opportunities." He suggests increasing “situational awareness” to adapt faster, and more succesfully to what is really happening rather than what your plan says.