First of all, preparing for an event predicted on 12/21/2012 assumes I will be alive on that date. An assumption of that type can be very misleading. If I die tomorrow - preparing to have all that time between now and 12/21/2012 deceives me (or anyone) into the belief that they have more time.
I try to live every day as if it were my last; keep my spiritual house in order (so-to-speak) and carry on living my life to the fullest - which I believe is my responsibility.
Good luck and happy reading!