Most people know about using logon scripts, but few know that you can actually put in place a logoff script which is executed when the user logs off the network. So what can you do with these scripts? Things like using them to delete temporary files various folders etc and clearing out things like that from the computer that the user has used.
The following MS KB articles apply to Windows 2000, but equally apply to Windows 2003 and Small Business Server 2003
How to assign scripts in Windows 2000
Overview of Logon, Logoff, Startup and Shutdown Scripts on Windows 2000