is to hold the glass at a 45 degree angle, fill the glass 3/4 full by pulling forward on the tap handle, let it sit 2 minutes to settle (don't rush this step), then top it off by pushing backward on the tap handle. this should make a nice, creamy head about 1 inch tall.
it will take a bit of playing with to get the knob on the back adjusted right to get a good pour, but it was easy enough to get it right during the first pour. i'm not sure how the newer faucets without the adjustment knob get the flow right, maybe it's all in the tube 