After reading another article on the advantages of a pen and paper based daily planner and reading on how people complain (over and over again actually) that there is no backup for them here is mine.
Use another planner for the same year which is always at home!
You only have to synch it from time to time (usually once a week) and add the new appointments from your planner which you actually use on the go. It should not be much trouble and is actually faster than with a digital solution (even while using a better input system than the normal soft keyboardfrom my ipaq).
Its easy, cheap (you can buy the cheapest and ugliest planner as a backup solution), needs no battery and stores data for years to come(not that i know anybody who needs his appointments 10 years after they happened but it is still possible).
If you have to travel you just keep the backup in your hotelroom safe.
and here is the post which made me write about this:
7 reasons to ditch your pda and switch topen and paper
it is one of many out there and is recommended for everybopdy who is not quite happy with his pda
Posted by consi 