How do you get your little sister to stop being so self-centered and annoying?

* You must realize you were the same as your little sister at her age. You may not think you weren't annoying, but most young children are. She is simply growing up and experimenting with her own personality and the best you can do is try to guide her down the right paths of life, but if she resists, then she needs to learn at her own pace. Her peers will set her straight and you won't have to do a thing. If she is extremely annoying then go somewhere where you can have some head space.