So you really mean "TOP 10 VI Toolkit Oneliners"?
My 2 cents:
To get all errors from the past 24 hours, enter:
Get-VIEvent -Start (Get-Date).AddHours(-24) -Type Error | Format-Table CreatedTime, FullFormattedMessage -AutoSize
A printed overview of the top-twenty volumes on your virtual servers with the least free disk space:
Get-VM | Where { $_.PowerState -eq “PoweredOn” } | Get-VMGuest | Select VmName -ExpandProperty Disks | Select VmName, Path, @{N=”MBFree”;E={[math]::Round((($_.FreeSpace)/1MB),2)}} | Sort MBFree | Select -First 20 | Format-Table -AutoSize | Out-Printer
Setting VM descriptions:
Get-VM | ForEach { Set-VM -VM $_ -Description (Get-QADComputer $_.Name).Description }
Finally:
Get-VMHost | Sort Name | Get-View | Select Name, @{N=”MemoryGB”;E={[math]::Round((($_.Summary.Hardware.MemorySize)/1GB),0)}}, @{N=”MemoryUsageGB”;E={[math]::Round((($_.summary.quickstats.overallmemoryusage)*1MB/1GB),2)}}, @{N=”Percentage”;E={[Math]::Round(100*(($_.Summary.QuickStats.OverallMemoryUsage*1MB/1GB)/($_.Summary.Hardware.MemorySize/1GB)),0)}}
(Search my website if you cannot figure out what it does 
)
Hugo Peeters