Nathan,
I was a bit rushed when I answered your previous post. I should have added my complete process when I answered.
I save the carcass and skin, and put it in a 400 degree oven for 30 minutes, along with a quartered onion and a few carrots. Roast everything to get a caramalized flavor. I then put all of that into a large pot and cover with water, and simmer for about 2 hours to make a stock / broth.
I freeze in 2 cup containers. That way I can use the broth to flavor rice (usually 1 cup rice to 2 cups broth). Or I can use the 2 cup frozen brothe to start a soup.
Good luck,
Ray