What do you do to be a successful person?

Today I felt lost. I didn't know which is my aim, or my passion. I have so many activities I like, that I don't know which ones are relevant. I want a successful career and I learn everyday, but is not enough. All the books tell you that you should know exactly what you want to become, what you'll do in 5 or 10 years. I used to know, but I don't anymore. I used to know step by step which is the final destination, but now I am confused. I like many things and I get bored of things very quickly. I like to learn more and more. I want to know about almost everything. I want to be complete. I want a piece of this and a piece of that. For me a successful person is a person complete. I want to be successful inside not only outside. I learn everyday to be a successful person, I try to see my defects, and to improve my qualities. I learned today, that some of us shouldn't know all the road, it's enough to know 100 meters in front of us, and in time we'll see gradually our life mission.