Well done is better than well said.
It's always too early to quit.
Go for it now. The future is promised to no one.
If you've got a talent, protect it.
Be kind whenever possible. It is always possible.
Be thine own palace, or the world's thy jail.
Know or listen to those who know.
Never complain and never explain.
The wise does at once what the fool does at last.
What you do today can improve all your tomorrows.
Failure and things of this sort - you can take it one of two ways. You can either let that hurt you and really affect the way that you live your life in the future, or you can use that as an opportunity for growth.