Buy yourself a mirror.
When I work with my clients, I explain to them that my job is to be their sounding board, and also -- more importantly - their mirror. Mirrors show people for what they truly are, in an undistorted, simple way. Not every client likes this concept, thinking it sounds strange or, more often, afraid of what they may see in themselves. There is no harder person to face than ourselves.
Truth is, looking in a mirror is not only the best thing you can do for yourself. It's is the one thing that you owe yourself to do frequently - and it will have an instant, positive impact on managing your business.
Employees receive feedback on their performance at least once a year. For business leaders, especially entrepreneurs and C-level executives, that feedback is often harder to come by. No one wants to be the one to tell the boss...