PowerShell Quick Reference Guides and Cheat Sheets
Becoming effective with PowerShell is quickly becoming essential to working effectively with Windows Server products. With PowerShell modules for so many products it is getting hard to keep track of all the command lets. Luckily Jonathan Noble has put together a list of PowerShell Quick Reference Guides and Cheat Sheets for various products.
http://www.jonoble.com/blog/2011/12/12/powershell-quick-reference-guides-and-cheat-sheets.html