Adding WhatIf and Confirm Parameters to your Powershell
One of the handy functions built into Powershell, is the ability to preview what would happen if you run a command. This could be as simple as wanting to make sure that your Remove-Item actually deletes the write files, or that Set-ADUser changes the right attribute.
Hand in hand with -WhatIf is -Confirm, it will prompt you for high risk actions and confirm if you really want to perform the action, like deleting an AD user account.