Answer:
Integrity, Persistence, Focus, and inspiration.
Step-by-step explanation:
Before I go on to explain to you why I believe these are the four main personal functions and understanding for managing a successful business I have to tell you this is my opinion and I believe that you will gain much more knowledge on this question if you continue to ask and talk to people on the functions of managing a successful business.
Integrity. Having integrity is an important skill in life and the business world. You have to have a lot of self control and have the strong integrity to be able to handle the losses and wins of your business. There are people who are much harder to work with after a loss in their business and they cannot think as rationally as they could be thinking without that loss. If you have the proper integrity you would think of that loss as a new challenge that you have to get through and power over, you would learn from your mistake and try to solve it and stay strong through it, there is no option for success if you don't have integrity.
Persistence. You need to have persistence to lead a business and have the motivation for success. With persistence to succeed you are willing to do what you need to do and more to make it. A common trait of successful business men and women is persistence and knowing what they need to do to make it in the business world. There are countless motivational speakers that teach aspiring entrepreneurs. When your peers are out partying on the weekends you have to be on the top of your game, that is the difference of winners and losers. You are willing to work and put in the hours for your passion you will one day be able to go out and do what you want with the people you want because you worked when others partied. There is a difference with comparing yourself to others in the world but in the business world you must compare your business and the ethics and what you are doing that you could do better.
Focus. Focus is a skill inside and outside of the business world. Like integrity with focus you have an important skill that other competitors may not have. You are able to focus and analyze the competition, what you are doing right and wrong and taking the time and focus to understand what to do. As an entrepreneur you may want to take days where you focus and read in on the market and it will benefit you greatly.
Inspiration. Inspiration can lead you to do better, when you are inspired to do great and you find the purpose to succeed you will realize why you want to start a business. You will understand how hard it will be and the endless nights of working, you may be working 100 hour weeks. But when you find the inspiration and your purpose you will succeed.