I got really tired of spending so much money on broth when I made my Tex Mex Chicken Soup that I decided I HAD to figure out how to make my own broth. When I discovered how easy it was, I couldn't believe I ever bought broth!
Cook a chicken (or turkey) and enjoy it as a meal, or remove the meat for soup. Save the bones, skin, any meat you don't want, and possibly the fat drippings (more later). Place all these items in a large pot - the largest one you have. Then, cover completely with water and boil. Cover the pot to limit the evaporation. Simmer, simmer, simmer, simmer. Get it? Keep it simmering about 3 hours, but longer is fine. You could also add some salt to taste, but we often prefer to wait until we are making the soup to add the salt.
Note on the fat - I've made the broth with and without the fat drippings. As expected, it doesn't taste AS good without the fat, but of course its fattier with it! You may try adding half the fat for an equal balance, or leave it all out for healthier broth.