The most efficient method of waking oneself up with coffee:
Brew a nice large cup with the aroma filling the room and a nice small-bubbled coffee-foam forming to indicate both freshness and strength, then once it is done and you are filled with anticipation of the first sip…
unintentionally pour about 5% of the cup on your foot.
That will wake you.
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Excellent advice comrade
@QuantumHemp Thank you. I have verified this during several decades, so it should be reliable. ;-)