1/ Make sure your glass is clean.
Wash your glass in warm water with washing-up liquid and then rinse thoroughly with cold water.
2/ Wet the glass.
If you’ve time, cool the glass and rinse with cold water just before pouring.
3/ Open tap fully.
Hold the glass at a 45º angle just under the tap (not touching it) and open the tap quickly and fully. Let the beer flow down the glass. For a smaller head hold the glass at a bigger angle and further away from the spout.
4/ Level the glass.
As it fills up, move the glass to a vertical position and stop just before it overflows.