If you use Microsoft Outlook and like me receive a huge load of emails during your work day, give a look to ClearContext - it's not free, but it's really a great software, helps a lot in clearing and sorting tour inbox, and "getting things done".
I'm in the 30 days trial period, but I think that I will buy this one.
What you get after setup is a new Outlook toolbar that will help you categorize your email and file single mails or threads to folders (that ClearContext will create for you), and give you shortcut to new functions like prioritizing your contacts (so that email from high priority contact will display with greater emphasis), or turn off email notifications for - say - 30 minutes or an hour... but actually the things that ClearContext can do for you are many, and you will get e netter service :-) if you jump to their site and give a look to some of the very good video tutorials offered!