Parenting...

*SIGH* I am so frustrated, both for myself and my daughter. Being a parent is so difficult! I want my children to be well mannered, listen, do what they are told, and be happy, respectful little people. I don't know if it's just me or if all eight year old girl's are so trying? By the end of each day I am left feeling sad and like I am failing as a parent. I have the most amazing, smart, caring, beautiful daughter, but for what ever reason lately she seems to be pushing me to my limits. She does the opposite of everything she is asked to do and her attitude is awful. I don't know what to do and a little advice would be really appreciated!