You have to be willing to accept the information, you have to be willing to work hard. You have to be motivated to go to practice with an open mind. You have to be willing to be criticized. Only you can do those things.
And then ultimately what I tell the kids is: coaches can give you information, they can give you guidelines, and they can put you in a position. But the only person who can truly make you better is you.
Never assume greatness is for someone else. Imagine every day that you too can do great things. Have the courage to take the challenge, make the mistakes, and move forward.