Believe in yourself
Nothing else is better to heed than this one sentence. You are the most valuable person in your entire life. You are the most valuable person in your entire family. It is wonderful and valuable to do things for other people, but without yourself you are nothing.
The mere fact that you are alive means that you are supposed to be here. Believe that there’s a reason you exist. Believe that the world needs you at this moment. Believe that you are magnificent and special and wonderful. Believe that you are amazing. Everyday think of one thing about yourself that you are happy about. Believe in yourself!