Earlier I posted some scripts that I use with my Hyper-V instances to reduce clicking and mentioned filtering. To Filter, just use a Where-Object like so:
Get-VM | Where-Object{$_.Name -Like "SQL*"} | Stop-VM
It makes the scripts from before more powerful, especially if you use some standard naming conventions for your lab VMs. Technet has a good coverage of the parameters you can use in a Where-Object, but I mainly use the -Like comparison operator to match regular expressions.
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