User Guides

Basic   (These guides require you to login with your Groupwise ID and password)
Prepare for migration (choose your domain): Follow these important steps in the days leading up to the switch to Google Apps.
Log in and get started (choose your domain): Log in to your new Google Apps account and learn the basics of sending mail and working with Calendar events.
Advanced (No login required)
Become a Gmail Ninja (PDF) Find a wide variety of tips on reading and managing your email.
Start using keyboard shortcuts (PDF) Enable keyboard shortcuts in your Gmail settings. Then quickly perform almost any Gmail task without a mouse.
Become a power searcher

(Scroll down after opening the link.)
(PDF) Quickly find any message using powerful search operators and shortcuts.
BlackBerry
BlackBerry Feature Guide Review this overview of BlackBerry features supported by Google Apps.