You don't have to worry about 2012.

Here's a couple of reasons why:

1) The planets are not scheduled to align in 2012. In fact, there will be no major planetary alignments in the next few decades. Even if there were, planetary alignment would have a negligible effect on Earth.

2) There are no planets or asteroids that are set to crash into Earth. Astronomers are watching out for that sort of thing, and they haven't seen any.

3) The Mayan calendar will end in 2012. Rather than signifying the end of the world, what instead will happen is that the calendar will reset.