Here you can find a complete list of PowerShell resources recommended by me and our resident PS-Guru, Nicholas Dille.
- The PowerShell Best Practices and Style Guide: https://poshcode.gitbooks.io/powershell-practice-and-style/
- Professional PowerShell (by myself): http://dille.name/professional-powershell
- PowerShell Planet: https://www.planetpowershell.com/
- Microsoft's PowerShell Documentation
- PowerShell Communities including StackOverflow
- The Powershell Gallery - Official repository for PS-Module and PS-Scripts that you can download and use
- PowerShell Magazine (PS-people like Keith Hill post articles here)
And, last but never least