Put half the wood chunks on the cooking grate over a lit burner. If you're using chips, put half in a smoker box or disposable aluminum pan. Oil a shallow grilling rack--Weber's small roast holder is perfect--and put the turkey on it, breast side up. Set the rack over the drip pan. Cover grill.
Track the Temperature
The most important thing is to know when your turkey is done, so a good thermometer is critical.
The best for beginners: a cord-style one specifically for grilling. Before cooking, insert the wand into the thickest part of the breast to the bone, and leave it in; a digital readout shows temperature and beeps when it's done.
Or, use an instant-read thermometer. The fastest and most accurate is the Super-Fast Thermapen. It gives you a reading within 3 seconds. Start checking after 1 1/2 hours.