Some are predicting an enormous solar storm will wipe out the Earth in 2013.
Then there's the Second Coming of Jesus Christ, which is predicted to happen in 2018.
Then there are some Koranic predictions of doom for some time in the next century.
And if none of those get you, the Sun eventually will. Scientists predict that in a lazy few billion years the Sun will become a red giant and obliterate Earth. Sorry to break this to you, but that last one is true.