If you have drippings from your meat, you can reserve it for gravy. Simply remove all of the meat, bones, etc, so you are left with only the drippings. Put the drippings in a saucepan, over medium heat. On the side, mix together 1 cup water with 2 tablespoons corn starch. When the drippings come to a boil, slowly pour the water/cornstarch mixture into your drippings, about 2 tablespoons at a time, until the drippings have thickened. Add salt and pepper to taste.