DD(9) appears to be starting puberty. I know it's quite young, but I'm sure she is entering the early stages as she's getting puppy fat and suffering from mood swings. Not a day goes by without her stomping up the stairs and slamming the door to her bedroom, either in tears or shouting something along the lines of "No-one cares about me, everyone hates me!" 
So I'm looking for tips really. No doubt I can buy a book, which I'll probably look for anyway, but I'm hoping that there will be some fine words of wisdom out there on how to deal with/ help the mood swings/ tantrums without us all ending up screaming at each other. Thanks.