NLP or Neurolinguistic programming describes the importance of believing in what you say. If you were to say you are a success, than you will become a success. And not, if you keep saying otherwise. Now, don't just suddenly start saying to yourself, your are successful again and again. It only works if you BELIEVE that you can. NLP says that when you say, you believe. When you believe, you do. Sounds easy and very obvious. But people still don't do it. They doubt themselves. When you doubt yourself, NLP still works. If you doubt you are unsuccessful, then you become unsuccessful. For me, I choose to believe I can, regardless of the situation. Because when you believe (even in a problematic situation), you then start finding solutions to the problem.
My father told me this. If you see, then believe it's normal. But if you believe first, then you see...it belongs to you. For example, when you believe the potential in a business idea of yours, and you managed to turn it into reality, it's yours.
Don't say, "I have no talent as a leader", "I'm not smart like you" and etc. That kind of thinking brings no good to you. We are young. We should never be afraid.
THIS IS NOT THE TIME I SHOULD DOUBT MYSELF! I CAN DO THAT WHEN I'M DEAD!!!
(can also replace 'dead' with 'older' ; )Have the desire. Not following your desire and giving excuses shows that you really don't desire it so much. Don't make excuses. Understand what you really want. Commit to it. Find solutions to get it. Doubt is there to stop you from making mistakes not to stop you from achieving more.
Just Do It!