1 thing I will say is that I do believe this Mayan prophecy thing is over blown. Personally I only feel good things for the end of this year
That being said, ignoring your own intuition is not good and if you feel like you need to back up all your data you should do so. Maybe there isn't going to be world wide catastrophe but you never know if you are going to be dealing with a tornado or maybe a minor earthquake where you live. Better to be safe and take precautions. We were talking about getting maybe a hard drive and storing it at my brother-in-law's house (PW encrypted of course, not that he couldn't break if off if he really tried) and him doing the same with us. 16g flash drives are pretty cheap nowadays, that would certainly be enough for personal records and some important pictures. Also never a bad idea to keep some non-perishables and a first aid kit around. Be prepared, not paranoid.