whatever you do, don't try treats as a 'vribe' for good behaviour. they should be earnt otherwise they will just not appreciate them or care if they are removed. yes, look at supernanny for tips - jo frost is just brilliant. but, equally, you must show the child that you wear the trousers in your house, not them. sounds harsh, but my mother sorted out my brattish behaviour by removing all my belongings from my room and then locking me in. a couple of hours spent in abject boredom over a few days and the threat of it being continued sorted me right out. either that or make sure you praise the other good child and give them treats, explaining why to encourage good behaviour. be firm! x