If you use Windows XP at work, but Linux at home, you may be missing the multiple desktops feature that Linux provides . http://virtuawin.sourceforge.net/ is the answer.

I don't use the "group similar taskbar buttons" Windows XP feature but find multiple workspaces a handy way of dividing your "work" applications (Outlook, Microsoft Office etc) from "home" applications (Dia, QCAD, PuTTY, Thunderbird, Firefox etc).

Once you install VirtuaWin, use the Windows Key and the left, right, up & down arrows to move between workspaces.