Oh, ive been there! My dd1 was sent to me from hell! dd2 is far more placid, but lazy too.
They are 7&4 now.
When dd1 was 3 dd2 was just a baby, less than 1yr.
I dont know how i coped.
I put the tv on alot. Not all of it is bad, i try to choose dvds that are slightly educational or classic films too.
Dont give yourself such a hard time about the tv. If you really want to limit it, use it as a reward. "if you can play nicely for 10 minutes (set a timer, have your cup of tea and start with only 10 minutes increasing to longer spells) you can watch a dvd after"
That way you get the 10 minutes and possibly another hour of peace.
I have to put my girls in their rooms if im really not coping. The volume of the screams and everything just drives me to the edge!
All you can do is your best.
I agree with sticker charts/reward/praising the good and ignoring the bad amd the distraction wherever possible.
It is hard though, to remain calm. My dd1 is full of backchat, which i just cannot cope with. Seriously see red mist!
I have smacked, but like you it doesnt make alot of difference. I use it more like a threat now, they know i will do it, and especially when we are out, i just say "do you want me to pull your pants down and sack you in front of all these people?"
The answer is always, no.
I have spent hours hanging all my body weight on the door handle to dd1s bedroom, to stop her getting out once id put her in there.
She has grown to know that she has to ask nicely, and has calmed down, and i have calmed down too.
I love her to bits, dd1, but honestly sometimes ive been that close. And that breaks my heart.
She is 7 now and is sooo uch easier! Still gives me grief, but not like when she was 3/4/5! Especially at 3, she was jealous too (still is a bit) of dd2. All the cuddles and time and attention she got from me used to be solely for dd1. I tried not to, but well a newborn/lo takes all your attention. DD1 was just in my way most of the time.
It does get easier, but its a long time comming.
You can do it, if i did!