Well I have to disagree. I can think of little food worse that a turkey done in a bag. That to me to is just a steamed turkey. I've done turkeys for decades now and tried many differing methods. My recent success is in a convection oven set at 325. A 12lb turkey should be done in a couple of hours that way.
If you just have a regular oven then salt and season it overnight, pat it dry, rub some olive oil on it and put it in a turkey rack, the V shaped kind, breast up with the legs tied and wings tucked. Add some water and vegetables to the pan to flavour the juice and baste it after the first 45 minutes. USE A MEAT THERMOMETER! I take it out when the dark meat of the thigh reaches 160, then let it stand covered with foil for about half an hour for the juices to flow through the meat and to finish cooking a bit.
As for brining, I've had very good success with that method, but you must have either a fresh turkey or one that has not been injected with water. I used brown sugar and some bourbon along with the salt - great flavor.