I truly think that something will happen in 2012, but it won't be the end of the world. Not all doom and gloom and everyone dies type of end.
I think there will be something major... and it will change the world "as we know it." So life as we know it now, won't be the same. But I don't think it is a bad thing.
I have a lot of theories on things like this.... and just to throw it out there, I think it has to do with a different form of life-being and I also think that the US Government knows ALL about it. But thats just my opinion. I have forms of evidence to back up my opinions too.
I live my life from day to day. I try not to worry about the future too much (unless I have to) cos if something does happen next year, we are all powerless to stop it anyway, so why cause yourself stress about something that you cannot prevent.