I imagine a lot of people wouldn't survive to see the comet. Once word got out there'd be worldwide panic, hoarding, looting, martial law, and severe rationing. If you didn't already have a few years of food, medications, and citical supplies stockpiled you might be SOL. How would you buy enough food if govenrments around the world were stockpiling every available resource? Life would definitely suck for the average person, myself included. I imagine living on an abundant coastline would be easier as you could fish and forage but who knows. Plus, everyone would probably be relocating inland so you might have the place all to yourself.