On a gas grill, fill a reusable smoker tray or a foil pouch with two to three handfuls of wood chips. Place the tray or pouch directly over the hottest burner until it begins to smoke. Using tongs, move it to one side to make room for the food. The chips will smoke for approximately 20 to 30 minutes. Be sure to have a second pouch or smoker tray ready when cooking for longer periods of time. See the manufacturer's instructions for use with electric smokers. Scan for video instructions. Tips and Techniques: To accelerate the smoking process on your gas or electrical grill, use only dry chips and turn the temperature to high when you first place your pouch or tray on cooking grid. Within a few minutes, the chips will begin to smoke. At that point, turn the temperature to your desired cooking level. If the chips flame up on your gas grill, use a spray bottle of water to douse the flames. This tip does not pertain to electric grills. Wood chips can also be used on charcoal grills as described for gas grills. However, wood chunks work better with charcoal than chips.