I mix up the stuffing, let it cool and stuff the turkey right before I put it into the oven. Don't let warm stuffing sit in an uncooked bird for long. Sometimes I use something to tie the opening shut, usually the birds come with a metal thingy that holds the legs together so I put the legs back into that. I like to cook my turkey in the Reynolds turkey bags. They come out so nice and moist. Stuffing that is cooked in the turkey has so much more flavor, ( though I am not a real stuffing fan, don't like my mom's stuffing) If I have too much stuffing I cook the extra in a casserole dish in the oven and then often mix together the two to give it all a good flavor.