Summarize this article in one sentence.
One of the worst things you can do as a supervisor is to doubt your own abilities. If you're new to supervising others, recognize that you will probably make some mistakes along the way, but that does not mean you are not a good leader. Cut yourself a little slack, but then commit yourself to doing the best you can. Keep in mind that you were hired to be a supervisor because your boss believes that you are capable of doing the job! Now you just have to prove your boss right. Don't let yourself believe that bosses never make mistakes. Nobody expects you to be perfect except yourself. It's important to give your employees a good example of model behavior. Just because you are in charge does not mean you no longer have to abide by the rules. If you are hard-working, committed, and ethical, your employees are more likely to be that way too. Remember not to let your new-found power go to your head. It's important to respect your employees if you want them to respect you in return. Your attitude is just as important as your actions. Always be friendly and professional. It's important that your employees know what to expect out of you. Be sure to always lay out the rules and expectations to new employees and to enforce these policies consistently. If there are changes to the policy, make sure the employees understand them. Try to keep your emotions under control as much as possible. Always treat employees fairly, and don't favor one over another. Good supervisors can't be completely stuck in their ways. They need to be willing to recognize when a specific approach isn't working and make changes accordingly, even if it involves admitting that they were wrong. You also need to be able to adapt your management style to the needs of different employees. Some employees may flourish under hands-on management, while others may benefit from more freedom. It is your responsibility to recognize these needs and react accordingly. This does not mean that you should have different standards for different employees in the same role. While you may want to customize your approach to each employee's working style, you still must be consistent in your expectations and disciplinary measures. As the supervisor, you are responsible for your whole team. If you miss a deadline or lose a client, don't point fingers and blame others for the mistake. Instead, evaluate the role you played, admit your own mistakes, and come up with a plan to avoid making the same mistakes in the future.

Summary:
Have faith in yourself. Lead by example. Be consistent. Be willing to change. Be accountable.