"Now, the rhino is not a particularly subtle or clever animal. It’s the last of the antediluvian quadrupeds to carry a great weight of body armor. And by all the rules of progressive design and the process of natural selection the rhino ought to have been eliminated. But it hasn’t been. Why not? Because the rhino is single-minded. When it perceives an object, it makes a decision – to charge. When the charge is over, the object is either flattened or has gone a long way into cover, whereupon the rhino instantly resumes browsing."
"Johnson says that when he knows friends are stuck and cannot seem to get off the dime on a project, he will send them a “rhino card.” The rhino card has a painted watercolor of a rhinoceros on the front side of a postcard. He then writes a note suggesting that they simply “charge it”, whatever it is, and admonishes them to remember the Rhino Principle."
Stop and think about where you might be stuck? Are you in need of a "rhino card"? Or do you know someone who needs a "rhino card"?