Fresh turkey has superior flavor and texture, but frozen turkey is fine. Make sure you leave enough time and room to thaw it in the refrigerator. It takes about 24 hours for every 5 pounds. If you start to cut it close on time, submerge the frozen turkey in cold water in the sink, and change the water frequently. It will take about 30 minutes per pound to thaw.
To prepare the turkey for roasting, take it out of the plastic bag. Remove the neck and giblets (the heart, liver, and gizzard) from the neck and body cavities. If you like, you can use the neck, heart, and gizzard for gravy. Rinse the turkey with cold water and then pat dry with paper towels. Trim excess fat.
When you secure the legs, tuck the excess skin between the breast and the legs so the skin won't split as the turkey cooks. Secure the legs by tying together with kitchen twine. Lift the tips of the wings up and over the breast to the back, and tuck them under the turkey; secure the excess skin of the neck flap (if necessary, use a wooden pick).