Children need boundries IMO. As a parent you often have to do the thing that it unpopular. On here you get people getting in a state because the DC seems to love the DP more or they say 'I hate you'-all quite meaningless-you just need a matter of fact reply like 'just as well I have enough love for 2' etc.
I think that you need to try concentration games with yours PinkTulips like playing 'My grandmother went to market and bought some apples' and the next person has to say 'My grandmother went to market and bought some apples and some icecream' etc so that you have a whole list to remember-anything that means that she has to listen.
First of all you need to stay calm yourself. If you breathe in for 7 and out for 11, it automatically calms you.
Language is never neutral; it will always trigger an emotional response in those who hear it, so it is better to generate a positive response rather than a negative.
If you get into a power struggle you are doomed from the start.
The body has automatic responses. If you hear an unexpected scream, your heart rate will go up. If a lion walks through your door you won't wonder where it came from, you will go into survival mode!
The brain is programmed from birth to follow patterns and make connections.
If I say to you 'I am going to give you one important instruction and I want you to follow it. DO NOT think of something blue', The brain automatically thinks of something blue!
Therefore rather than say ' Don't run' it is better to say 'walk please!'
Going with the positive is better than the negative.'We won't go out until you have your shoes on' isn't as effective as 'when you have your shoes on we will go out'.
Try and stay calm and logical. As soon as you, or the DC, gets into emotional arousal all logic is lost and you say things you don't mean.
Keep the focus on primary behaviour and try and ignore secondary issues.
If they try to sideline it as in 'Its not fair xxx was....' don't get drawn in just say 'maybe and...' get back to the main issue,this means that you acknowledge that they may have a point but not one you are interested in at the moment (you can discuss it later). This is very different from saying 'maybe but which is more confrontational and dismissing their point.
Use the I message a lot -as in 'if you shout I can't understand what you are saying. Please tell me again quietly'.
Or 'if you start fighting it makes me upset because I want to get the baby fed so that I can play a game with you.
Tactically ignore some behaviour and use the word when, as in when you are sitting down I will give you a drink. When you have brushed your teeth I will read you a story.
The broken record approach, gradually getting calmer is quite useful.
Distraction and humour are very useful.
Use body language to convey confidence.
Make consequences logical.
I hope it helps. It isn't possible to do it all the time and it often goes pear shaped! Just do the breathing and start again.
It's a bit like dieting-you can have good days and bad days!! Don't beat yourself up about the bad days.
I think separating yours PinkTulips and giving them individual time would help. When mine were that age DH and I agreed that taking one out was lovely (it didn't matter which one)but taking 2 out was hard work!