I've been writing a lot of XML files for creating SharePoint 2007 features. Every element is identified with a GUID. That's a lot of GUID's to be generated. In the beginning I used the Guidgen tool that ships with Visual Studio.
But that wasn't very effective. So I wrote a little console app to help me out.
class Program
{
[STAThread]
static void Main(string[] args)
{
Guid g = Guid.NewGuid();
Clipboard.SetDataObject(g.ToString("B"), true);
}
}
Put it in the Quick Launch-bar and boom, everytime I hit it I have a new fresh GUID string in the clipboard.