Soak plank (or planks if you need more than one) in water for at least 1 hour.
Fire up your grill to medium-high heat, around 400 F.
Place the plank over indirect heat. Add the chips. Close the lid.
Let the chips grill for 2-5 minutes. Check them at least once. If they start to turn dark brown or char on the edges, remove them.
Let cool slightly before serving.
Notes
Note: If you prefer a stronger cedar flavor and aroma, place your soaked plank over direct heat for a few minutes first. Get a nice char on the plank. Then move it to indirect heat and add the chips.