When I'm talking, or writing, about PowerShell I often refer to your four friends when you are first learning PowerShell. These are:
Between them you can discover a vast amount of information about how PowerShell works. if you are new to PowerShell I would strongly recommend getting to know these four cmdlets very well. The time will be amply repaid.
There may be a new kid on the block to join these four. Jeffrey Snover has posted a script on the PowerShell team blog to display the cmdlets in a particular snapin as a chart based on verb and noun. http://blogs.msdn.com/powershell/archive/2008/11/22/verbs-vs-nouns-by-snapin.aspx
This is very useful.
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