I tend to replace pillows rather than try to wash them, they are never the same and often lumpy after washing. Duvets get a wash when I can be bothered.
Curtains, vac'd, really?
General vac/dust when it's needed etc, occasional blitz of a room is what my house gets.
My friends Mum is a stickler for cleaning, her house is always spotless. When her granddaughters were young she would have them washing their hands every time they did something, coming in from the garden (not allowed to play with anything dirty though) or doing anything indoors. Those girls had every illness going, spent all winter coughing etc. Always off to the doctor with one of them. In the end the doctor said to the Gran (she'd taken one of the girls into the surgery, where she also worked) that part of the problem was they were kept too clean and had no natural immunity. He said he knew how houseproud she was, basically telling her in a round about way she wasn't helping the problem. She never changed her habits. A bit of dirt never hurts.