If you ever use VMware with thin provisioning you are probably always wondering how much disk each server is actually using. This command gives you an idea on what your disk utilization is by server.

find -iname '*.vmdk' -exec du -h '{}' +

So, if you have SSH enabled on your VMware host,

cd /vmfs/volumes
find -iname '*.vmdk' -exec du -h '{}' +

Take the output, put it in Excel, etc.