The book I quoted earlier explains how we get into a negative "dance" of screaming and shouting with our kids....kid learn the dance steps and so they just follow the dance until its inevitable conclusion -mum goes ballistic...
So:
Mum: Jenny pick up your shoes and take them to your room please.
jenny: I;ll do it later
Mum: No, do it now
Jenny: I'll just finish this game...
mum: I told you to pick up your shoes. DO it now or you lose your pocket money
Jenny: In a minute
Mum: Im warning you, you will have no pocket money this week
Jenny: You're so unfair
Mum: DOnt throw that book on thefloor
Jenny I hate you, you expect me to do everything in this house
Mum: Dont speak to me like that - go to your room
Jenny: I wont and you cant make me
Mum; You are grounded young lady!
Jenny : (%%(&)
Mum: And you're not going to the movies on Saturday....
etc etc etc.
SO the first 2 or 3 times you ask something, they know how the dance goes and they know your threats are empty until the 3rd or 4th time you ask them, so they ignore you and then you get angry and then they wonder Why? WHat did I do?
The key is to be absolutely consistednt absolutely 100% of the time.
Mum: Jenny pick up your shoes and take them to your room please.
jenny: I;ll do it later
Mum: No, do it now. If you don't, the TV goes off for the rest of the day
Jenny "I'll just finish this game...#
Mum: Tv is now off for the rest of the day.
Jenny: Thats so unfair!
Mum: Next time, do as I ask when I ask or accept the punishment.
Jenny: I hate you
Mum: Im not going to debate this with you. (Exit stage left)
Good old walking away. They cannot argue with you if you will not engage.
Also, make sure punishments fit the crime and you dont heap one punishment on top of another and another and another. Let them kick off about the punishment, and by all means say "if you continue to throw things around your room, there will be no TV tomorrow until it is tidied up" - and follow through!
1 warning only, immediate follow through.
The big tears and tantrums? They do it because sooner or later it illicits a response. SO from now on, no response unless they are calm. DD once had a 4 hour tantrum. That was the last one. She got zero response. ANd she had to sleep in her trashed room and clean it up the following day. and still the initial punishment held.
Angry mum can always say "Im sorry I cannot talk to you at the moment as I am too angry. I will talk to you later when I am calm" - see how that mirrors what you are telling/showing her about tantrums.?
MOST CRITICAL, the following day, dont capitulate because you feel guilty! Its amazing how often I would do this. Id institute an unworkable punishment and then drop it the next day because it was inconvinient and I felt bad about screaming at my child.
You an get through this stage. You have a long walk ahead, but you can do this.