How to get a summary of disk usage with du

The following command gives me a listing of the sizes of all the directories in the root directory /.

# du -chs /*

Here is the results of that command on one of my servers:

0       /bin
280M    /boot
16K     /dev
37M     /etc
79M     /home
0       /lib
0       /lib64
0       /media
35T     /mnt
2.8G    /opt
0       /proc
7.2M    /root
9.4M    /run
0       /sbin
0       /srv
0       /sys
324M    /tmp
2.1G    /usr
...