Get the fire going. Start by filling up the chimney with instant briquettes (roughly about 30 briquettes).
Light them and let them turn grey, uncovered, about 20 minutes.
When the coals are greyish, remove the chimney. (Wear an oven glove).
Spread the coals towards the middle, leaving the outer rim without coals (ie, cooler).
When the grill is hot (about five minutes later) use the grill brush to remove old food.
Cover with the lid, leaving the little vent open.
About 5 to 10 minutes later, remove the lid, and start grilling your food as per your recipe.
When done grilling, cover and set aside to cool. Remove coals next day.