And as far as being prepared, there is no being prepared. Even if we would to bury ourselves went underground life as we know it would cease to exist on the surface and it would not return to anything we know for probably several hundred years.
So if it's coming let it come, I'd rather be dead then survive. So, I reckon I'm prepared as much as anyone.
I'm with Ron on this one. However I don't see why any one should worry. There's only two things that can happen. If it hits we all die so there's no chance to worry. If it misses it would be silly to worry wouldn't it?
The way I see it is like A.J. said. We only have two worries. Weather or not it hits. If it misses no worries. If it hits still only two worries. Heaven or hell? Heaven no worries. Hell to busy catching up with friends and relations to notice where we are. So still no worries.