ive had my iphone for a few months now and love it 
my friends say that i should back stuff up on my lappy incase i lose/break/upgrade etc iphone
without sounding really blonde thick
how do i do this
i know it is something to do with itunes
do i just plug in my iphone to lappy and it finds itunes
or do i have to call up itunes as a page and then click/save stuff etc
help please :)
thank you