Me, personally? I know the end of the world would involve family, lots of beer, enough fattening food to kill a bull elephant, and some mindless destruction of various and sundry recalcitrant home electronics via ballistic projection. Nothing says "end of the world" like blowing the living hell out of a printer that never worked right with a shotgun, you know? Pesky laws about the discharge of firearms won't matter when the destruction of the planet is imminent (although I'll still obey the four rules, because apocalypse or not, good safety habits are good to have. No one wants to spend their last few moments on earth bleeding out).
So, how would you spend your last day on earth?
That is all.