Prepare for the unknown by studying how others in the past have coped with the unforeseeable and the unpredictable.
No bastard ever won a war by dying for his country. He won it by making the other poor dumb bastard die for his country.
The object of war is not to die for your country but to make the other bastard die for his.
Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity.
Watch what people are cynical about, and one can often discover what they lack.