well, U got it an "organiser"...
some people prefer hardware, as in a book, while some prefer to
go software...
For example, synching ur outlook calander into ur phone,
checking mails from ur phone... however, u'll have battery issues
with this if u are those type frequently spamming facebook, games
etc...
carrying a book ard definately no face the problem of running
out of battery, but it's quite a hassle to bring an organiser
ard...