Exchange 2007 has implemented a Get-Tip cmdlet which emits a tip of the day. Flaphead has written a small script which gets them all and has published them on: http://blog.flaphead.dns2go.com/archive/2006/08/17/3514.aspx.
There are a number of general tips along with the Exchange tips. Here is an example:
Tip of the day #29:
Tab completion reduces the number of keystrokes that are required to complete a cmdlet. Just press the TAB key to complete the cmdlet you are typing. Tab completion kicks in whenever there is hyphen (-) in the input. For example:
should complete to Get-SendConnector. You can even use regular expressions, such as:
Pressing the TAB key when you enter this command cycles through all cmdlets that match the expression, such as the Unified Messaging Mailbox policy cmdlets.
Jeffrey Snover [MSFT]
Windows PowerShell/Aspen Architect
Visit the Windows PowerShell Team blog at: http://blogs.msdn.com/PowerShell
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