While we are not kings, we each have values and desires that define who we are and who we want to be. Often we do things that we don't feel good about and we wish that we could do better. More important than simply doing better is being better. If we are striving to be the person we want to be then the things that we want to do as that person will naturally come. If we work to become a king, then we will do kingly things. On the other hand if we work to become scum, then we will do despicable things.
Decide what is important to you and what you want to accomplish in life, then decide what kind of person would do those things. Work every day to become that person. Ask yourself "Who am I?" and answer yourself with the kind of person you are striving to be. Whenever you have to decide if you want to do something or not ask yourself "Am I the kind of person who would do that?" If the answer is no then don't do it. When you know who you are making choices becomes much simpler because the answers are already inside of you.
Who you are and who you want to be don't necessarily have to be constant. As you advance through life, you may decide that different values are important to you and you need to be a different person in order to fulfill those things. Take care and time in deciding who you are. Be sure that the answer to your question of who you are is always one that will lead you to happiness and even greater heights than you are now.
Some of us define who we are by our family. Others by organizations they belong to. Others by religion.
I define myself by values that have become important to me, my religion, and titles I have earned that have special meaning to me.