my daughter was 2 in October. She is very strong willed and basically she will screech the place down if she doesn't get what she wants. I think it is a bit worse because she's got a 4 year old sister and they're always fighting over things. I feel that if i don't get a hold of this now she will continue this way and grow up not listening to me when she's done something wrong. What can I do to turn it around? how can i stop her screeching at us if she doesn't get her own way. Just keep saying no?