Effective PowerShell from http://keithhill.spaces.live.com/

Effective PowerShell Item 1: The Four Cmdlets That are the Keys to Finding Your Way Around PowerShell, Effective PowerShell, 

Effective PowerShell Item 2: Use the Objects Luke. Use the Objects 

 Effective PowerShell Item 3: Know Your Output Formatters

 Effective PowerShell Item 4: Commenting Out Lines in a Script File

 Effective PowerShell Item 6: Know What Objects Are Flowing Down .the pipe

 Effective PowerShell Item 7: Understanding "Output"

Effective PowerShell Item 8: Output Cardinality - Scalars .

 Effective PowerShell Item 9: Regular Expressions 

 Effective PowerShell Item 10: Understanding PowerShell Parsing