I ran across this article the other day about PowerShell, and thought it was a very good 50,000 foot view of "learn these things in PowerShell"
10 fundamental concepts for PowerShell scripting
or here:
http://www.techrepublic.com/blog/10things/10-fundamental-concepts-for-powershell-scripting/2146
And here's a cool trick:
http://blogs.msdn.com/b/powershell/archive/2010/12/04/the-great-dollar-dollar.aspx
