T.P.
is one of the 'tried everythings' threatening to take away something for the consequences of her actions?
my son isn't as old. he'll be 3 in january.. i tried the time outs and they worked at first. but now we use taking something away. taht has to do with the circumstances. like, if he is not playing nicely with is sister, we tell him the toy gets taken away if he continues. it's best if it's a threat that you can and will actually follow t hru with. if you are out shopping, and they act up,, don't use 'you'll go out to the car' one.. haha i've heard a parent say that once in a store..hahaa
my son usually acts up when we are trying to get ready to go someone. what usually works is 'get over here and get your coat on or we are not going'.. or 'you don't get to play with your such and such on the drive if you don't get your coat on'.. it's sometimes hard to think of something that is appropriate for the timing, at first. but it starts clicking after doing a while.. good luck,,
that's all i have.. not sure if that helped :-)