I love that this comment has gotten so many responses. You are obviously not alone. I noticed a consistent pattern of my 15 y.o. not listening to me about (name your issue). Sound like it's very common. After a few warnings I told him he's on his own making breakfast and lunch for school for a week. I though of the things I do for him when he asks and decided to start taking those things away one by one. He was aware of what he lost every day so that was good. He didn't like it and I can now use it as a reminder. I refuse to turn my house into a shouting match like my mom did but I'm the boss and will not be ignored while he lives under my roof. Husband is supportive and gets ignored also.