What do you do to stay calm?

I'm in my promotions for Gold on another account right now and I'm noticing I'm pretty tense while playing. So my question is, what do you do to stay calm? Do you drink green tea? Do you listen to buddhist monk music? Do you fold some origami dinosaur? What is your trick to stay calm? I'm hoping to get some inspiration that can help me stay calm when games are getting tense. Thanks in advance and don't forget, League is love, League is life.
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