PowerShell Tutorial
This is a example based tutorial for PowerShell, in the most concise way.
There are 2 major sections:
PowerShell How-To
Covers the most common tasks for interactive use, with focus on standalone sample code that you can use right away.
Xah's PowerShell in Depth
Covers fundamental concepts of PowerShell that are very different than unix/linux bash.
See also: Why I Love Powershell