One of the most widely accepted concepts in the study of modern business is the Peter Principle. This refers to the tendency for an executive to get promoted up until they are no longer good at their job. In other words, people are often promoted to a level where they finally become incompetent, and stagnate. Being good at an entry-level position may get you promoted in a managerial job, but will require an entirely different skill set to succeed.
How do you fight the Peter Principle? By continually learning and investing in your own career with education—both inside and outside the office.