Silentium!

Counter intuitive, perhaps, the exclamation mark following the request for silence. I always assume it to be whispered urgently, accompanied by the stern look and furrowed brow.
But I won't be caught whispering or breathing loudly right now, for there is silence in the house! Rare.

And coffee. Even more rare, Silentium + Coffee.
Discipline mandates: Now is not the time to knit, or pick up Cheerios. Now is the time to work.