I have noticed my root file usage getting rather high. Should I be cleaning up anything or monitoring anything?

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda2 135500 120548 7723 94% /
/dev/hda8 9582284 138484 8957036 2% /home
/dev/hda7 369000 8251 341089 3% /tmp
/dev/hda5 4807056 983664 3579208 22% /usr
/dev/hda6 2885780 206244 2532948 8% /var
tmpfs 249720 4 249716 1% /dev/shm

If you are on debian as your profile suggests, it might be the apt cache on the disk.

apt-get clean