If your turkey is frozen you need to start by thawing it. Place it in a roasting tray, breast-side up and in its plastic wrapping, and place in the fridge. It will take about 4 ½ days to thaw in the fridge this way (6 hours per pound of turkey). Drain off any water that collects in the tray as the turkey defrosts. You can do the cold water method of thawing by filling your sink with cold water and submerging the wrapped turkey in the water. Change the water out every 30 minutes, allowing about 8 – 10 hours of sink time for it to thaw. The USDA FSIS (Food Safety and Inspection Services) says that you have to cook the turkey immediately so you really need to do this pretty early in the morning (like, you’re-not-going-to-bed-Wednesday-night early), depending on when you plan on eating I guess, which means you don’t have much room for error in the event that the turkey doesn’t thaw fully. That, and because you may want to free up some freezer space for other uses, I favor the fridge method. I pull the turkey out of the freezer one week, to the day, before we’re having dinner – it gives you 5 days to thaw it, 1 day to brine, and 1 to dry, with perfect timing. You can take your frozen turkey out up to 2 days sooner and fridge-thaw it and it will be perfectly fine resting, thawed, in the fridge for those 2 days before you start brining.