disk partition.

I am facing a problem with one server.
/var space is going to be full always. How do I increase this partion
disk space. Please Advice me . No way to destroy any data.......... the
partition is as follows

system 1K-blocks Used Available Use%
Mounted on
/dev/hda5 505605 76113 403388 16%
/
/dev/hda1 101089 9379 86491
10% /boot
/dev/hda3 4743808 120316 4382520 3%
/home
none 63056 0 63056
0% /dev/shm
/dev/hda2 12982032 1293120 11029444 11%
/usr
/dev/hda6 1027768 666432 309128 69%
/var

Thanks
Amalesh