This has probably already been said but even Mayan scholars have said it's been blown way out of proportion. This would be something like the 4th "new age" and has nothing to do with the human race ending but they call it a "new beginning" which just means it'll be a new age for humans, no 'reset' of any kind, no end of the world or anything.
As far as the polar shift goes, scientists have said the only thing people have to worry about is that a satellite could fall from the sky and that's the most extreme case. 2012 will come and go as every other year has.