Question : Problem: managing my hard drive in linux

hi guys,
i have a linux box with two 120 gig hard drives,
today i noticed that my /home/ directory is 97% full which is impossible,
i am pretty sure something is eating up all the space, could be a log file or some backup files that is wasting all the space,
what is the easiest way for me to findout what is taking all the space,
for example is there a way to sort by size to see what is wasting it all?
ex: sort by size ( for folders ) to see which folder is taking all the space or ...?
any help is appreciated.

Answer : Problem: managing my hard drive in linux

Run:
cd /home
du -s * | sort -r -k 1 -n

It takes a lot of time (linux should scan every subdirectory).
Then go into most sized directory (at the top) and repeat.