Rinse the glass with cold water first, but don't dry it.
cold coke and cold glass is the key
Tip the glass.
This, and the bottle.
Ok you know the thing, you need a drink, you reach for the coke bottle, pour a few mm into the glass and end up with 6 inches of bubbles which takes about 20 minutes to subside.
Whats the secret to being able to pour a quick, full glass of fizzy?
Like a madman...?
Touch the top of the froth with your finger, it goes down quicker.