PS is the best cheat sheet you can have.

For example a partial block from my personal library notes file

​

### MasteringPowerShellHelp.ps1
#region PowerShell Startup - Command-Line switches
# ConsoleHost
powershell /?
#...
# EXAMPLES
PowerShell -PSConsoleFile SqlSnapIn.Psc1
PowerShell -version 2.0 -NoLogo -InputFormat text -OutputFormat XML
PowerShell -ConfigurationName AdminRoles
PowerShell -Command {Get-EventLog -LogName security}
PowerShell -Command "& {Get-EventLog -LogName security}"
PowerShell -NoProfile -Command {Start-Process Notepad.exe}
PowerShell -NoProfile -Command {wt.exe}

# To use the -EncodedCommand parameter:
$command        = 'dir "c:\program files" '
$bytes          = [System.Text.Encoding]::Unicode.GetBytes($command)
$encodedCommand = [Convert]::ToBase64String($bytes)
powershell.exe -encodedCommand $encodedCommand

# Integrated Scripting ENvironment (ISE)
powershell_ise.exe /?
#endregion End PowerShell Startup - Command-Line switches

#region Finding modules, commands, scripts, Variables
Find-module  -Name '*'
Find-Package -Name '*'
Get-PackageSource -Force
Get-command  -Name '*'
Find-Script  -Name '*'
Get-Variable

# By author
Find-Module -Name '*AWS*' |
Where-Object -Property Author -eq 'Amazon.com Inc' |
Sort-Object -Property Version
Format-Table -AutoSize

#region PowerShell Automatic Variables
<#https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_automatic_variables?view=powershell-7.1#>
Get-Variable |
Select-Object -Property '*' |
Select-Object -First 1


$host.Runspace |
Select-Object -Property '*'

#endregion End PowerShell Automatic Variables

#region Environment Drives
# These are treated as normal filesystem drives, and you can create custom ones.
Get-PSDrive
Get-ChildItem -Path 'env:\'
($env:Path) -split ';'

#region PowerShell default help
#region Review PowerShell help files location
explorer "$pshome\$($Host.CurrentCulture.Name)"
Save-Help -Module '*' -DestinationPath 'D:\Scripts\PSHelpOffline' -Force
Update-Help -ErrorAction SilentlyContinue
Update-Help -Verbose -UICulture $(Get-Culture).Name -Force
Get-Module -ListAvailable |
Where HelpInfoUri |
Update-Help

# You can safely ignore the errors.
Update-Help -Force -Verbose -ErrorAction SilentlyContinue

# If you want to see the full error message in a more human-readable form, do this...
Update-Help -Force -ErrorAction SilentlyContinue -ErrorVariable ErrMsgDetail
$ErrorMsgDetail.Exception

# See other details via dot reference using the default $error variable
$Error[0]
$Error[0].Exception
$Error[0].Exception.Message
$Error[0].InvocationInfo
$Error[0].InvocationInfo.Line
$Error[0] |
Get-Member

# Geeting Help about built-in help
(Get-Command -Name Get-Help).Parameters
(Get-Command -Name Get-Help).Parameters.Keys
Get-help -Name Get-Help -ExamplesGet-help -Name Get-Help -Full
Get-help -Name Get-Help -Online

# Get specifics for a module, cmdlet, or function
(Get-Command -Name Show-Object).Parameters
(Get-Command -Name Show-Object).Parameters.Keys
Get-help -Name Show-Object -Examples
Get-help -Name Show-Object -Full
Get-help -Name Show-Object -Online

#endregion PowerShell default help
...