What keeps me up at night is the thought that somebody else may have done better than me or that I didn't work as hard as I possibly could. I want to be the best. You can't be the best if somebody does better than you. If you aren't working as hard as you can, then you will never be the best. I am constantly stressing over working as hard as I can. I stay up wondering about certain people who may have outperformed me and what I can improve upon for the next day.