--The skills you're good at are just as important in life as the skills you're not good at. You don't have to give up and stop doing something just because it doesn't come easily, or other people are better at it. Even if you're not good at it now, keep practicing, and you'll improve.
--You are not your behavior. We all do the wrong thing sometimes, and I still love you. Instead of rejecting you, I'll take the time to show you why it was wrong, and what to do next time.
--If I'm going to leave you in charge of your younger siblings, and hold you responsible if they get hurt, I'm also going to tell them to listen to you. It's only fair.
--You're going to make a fine, competent, worthy adult some day who can take care of herself.