Gently stack the coke (left over from a previous fire) around the glowing coals. A pair of tongs would probably be useful for this step. Place the coke around and over the charcoal briquettes and provide a gentle blast of air to the fire. Wait for the coke to light and add more fuel as seems appropriate.
     If you are lighting a completely "green" fire, stack nuggets of green coal around the charcoal briquettes. Add a gentle blast and stand back, as they should light very quickly and produce huge clouds of greenish-yellow smoke.