If you have multiple email addresses the Advanced Guides offer the ultimate in efficient email management.  They show you how to set up email synchronization and how to manage all your email addresses from one window with one login.  Each email address has its own inbox and sent mail box.  You can send business email from Gmail and nobody will be able to tell it was not sent from the office.

Important! Before setting up Outlook for Email Synchronization please read this article: Naughty Outlook.