Here is an often overlooked time saver. How many times have you walked around the office punching in activation codes?
Use Windows Group Policies to remove that tedious task. Just enter your select server name and activation key into the Group Policy Management Editor and all your users will receive their activation key when they login for the first time.
This Wiki, Group Policy Administration (ADM) files, includes links to an Explanatory video and downloads for old style .adm files for Windows Server 2003 (what you're still using that version?) and the newer .adml and .admx files for Server 2008 and later.
If you or your IT team already know about Group Policies just go straight to the download links, using them will be obvious (except for one change, covered in the video, that needs to be made if using an old style .adm on Server 2008, but I can't see any reason for doing that now the .adml and .admx files are available).
Windows Group Policies are an immensely powerful tool that can save you days over the course of a year, well worth investigating. Ask your IT team or consultants what you can do with them.
Obviously this technique is only available to networks with a Windows Domain Controller.