1) Before you light the barbecue, spray the grill rack with non-stick cooking spray. This works great on gas or charcoal grills. Apply a liberal cook and food won't stick, making cooking and cleanup easier.
2) Immediately after grilling, make a ball of alluminum foil and "scrub" and warm grill rack surface with it, taking care not to burn your fingers.
3) Before setting a pan on the grill rack to warm bbq sauce or cook additional foods, rub the pan bottom with bar soap and it will be easier to clean the soot off the bottom of the pan when you are done.