What I mean is, I never put a food out without knowing what it tastes like already. So while I'm testing food, I can usually tell if there's too much cheese. If it's a baked dish, I can usually add more cheese if for some reason there's not enough. And if there's too much, serving with crackers or something can cut some of the cheese.
I taste the food while I am cooking it. I love cheese so I admit that I have the tendency to add more cheese than needed in some of my recipes. If it is a pasta recipe, I am generous at putting cheese.
Taste test is the best way but for my family its more about them having less and me having more. Being able to adjust it on the fly is what saves dinner on most nights. The other thing is there are certain things I will eat on the weekends when my spouse is not here (say if he has to run into work on the weekends), he refuses to eat Gratin potatoes.