Take your shisha of choice and loosely sprinkle it around the inside of your Phunnel Bowl. Fill it just below the lip of the bowl, about even with the center spire, so that the foil doesn't touch the shisha - which can cause it to burn and stick to the foil. Make sure that the center spire is slightly shorter than the outer rim of the bowl, otherwise you will not get proper airflow.
When poking holes in your foil, you have to decide whether or not you'd like to poke holes over the hole in the center. Some people believe that only poking holes where the shisha is helps to create a vacuum effect through the center, however others insist that poking holes over the center spire helps with airflow. You should try it both ways, and see what works for you.
Place your coals around the outside of the bowl, and wait until the smoke output begins to become significant. When the smoke starts thinning out, try moving the coals towards the center, but not over top of the center spire area.