YOU ARE SPECIAL!
You are a very special person. No one in the whole world is like you. It may seem a cliché but really, YOU ARE UNIQUE.
It doesn´t matter if you are not perfect, or beautiful, or the best, what matters is to do the best you can and day by day try to improve the traits that you want.
Yes, I know that that is not easy either, but really, it doesn´t matter if you made a mistake or even mistakes today; what really counts is the experience you get from it or them so you grow and get wiser and that way be more successful next time.