Homework
It's a nightmare isn't it? Eldest daughter used to work me up into a terrible state over her homework and she could make it last for hours. Now I explain what needs doing, make sure she understands, by doing a few examples, and then I leave her to it. If she doesn't do it or tries to get me to do it for her, throwing wobblies etc. I just say "Oh that's a pity you'll have to explain to Mrs L why you didn't do your homework" and I leave it at that. She adores her teacher and she doesn't want teacher to think badly of her so she usually does the homework. I refuse to get drawn into a big battle with me being the one who feels wretched and since I stay calm and put the ball back in my daughter’s court she usually sorts it out herself and peace reigns. Sometimes not caring too much works - give it a try and stay chilled!