How can I help my youngest daughter do better at life?

Positive thinking and positive encourgements will make her tackle things and address things postivively too. Dont scold her at the mistakes she does, always compliment her on anything good she does,handle her with understanding nuturing her good side. We can never be equal or the same so dont campare her with your other daughter bearing in mind that, we can never be the same. Take corretive measures wih understanding and not harshly, make a culture of chatting on the way forward whenever she does a mistake, I'm sure with these, some improvement willbe noted