Render a whole chicken for your stock in water. Keep is on a very low simmer. (with quartered onions, celery, salt/pepper corns, some garlic, bay leaf...basically you're making a stock) Takes about 3-4 hours.
sweat oniions, carrots, celery, maybe mushrooms separately.
add vegatables to broth (that you've pulled the chicken meat off of and discarded the carcass), simmer for a while, add noodles.
don't forget salt and pepper. You should be tasting it the whole time.
It takes a while, but this is how you make "real" chicken noodle soup. The taste of the stock alone makes your eyeballs roll back in your head.