partitioning hard drive & /usr is already 96% full

[Andy <list@firman.us>]

Fresh woody install on a 20 GB hard drive and partitioned my drive this
way after reading the recent partitioning thread on this list:
/         1GB
/usr     1GB
/var     1GB
/tmp     500 MB
/home  15 GB

The only thing I have done is install KDE 3.1 and OpenOffice.org and now
/usr is 96% full.  (/home is large due to temp. storage from another install)

Question for the list:
What is the lists advice in managing my /usr partition
so it does not completetly fill up and cause problems in the future?

Filesystem           1k-blocks      Used        Available    Use% Mounted on
/dev/hda2               964532     32044        883492         4%       /
/dev/hda3               964532     872024      43512          96%      /usr
/dev/hda5               964500     257156      658348        29%      /var
/dev/hda6               474443       746         449200        1%        /tmp
/dev/hda8             14824384  13234832    836508        95%      /home