Know your wood for adding smoke to your grilling and for your smoker. Good smoke is produced by a variety of hardwoods that are low in resin and high in flavor. (Only wood, no nails, glues etc.) Wood creates different kinds of smoke, apple wood imparts a mellow flavor without overpowering food, but needs a longer cooking time to give the flavor. Mesquite wood has a very strong smoke, and if the meat has a long smoking time, the mesquite may impart a bitterness to the meat.