1. Brine it overnight.
2. Marinate it with a mixture of light soy sauce, garlic powder, onion powder, sugar, salt, and freshly grind mixed peppercorns, spray a layer of cooking spray all over turkey to keep moisture in.
3. Roast in oven over a layer of chopped onion, carrot, celery, and garlic.
When it's done, save juice from bottom of pan, remove the grease, thicken the juice with corn starch and additional salt to taste. The juice will make a wonderful gravy.