Be confident. Too many days are wasted comparing ourselves to others and wishing to be something we aren't. Everybody has their own strengths and weaknesses and it is only when you accept everything you are - and aren't - that you will truly succed.
I am reminded of this daily with my work. My goal is to slow down and appreciate every moment, because before I know it, it will be 50 years from now and if I am still here, I will look back and miss these days.