Someone make me a guide on how not to tilt

When your playing against a champion you absolutely hate, that you know takes absolutely no effort to pull off and your being fisted, how do you resist the urge to flame the shit out of these 'players', to give you an example:

You just got triple crit by a forcing you to get snowballed on for the next 25 minutes while your team flames you for being bad, how do you resist the urge of telling the Tryndamere main that he has less chromosomes than is normal is not good at league of legends