A simple one really, but if you want to turn on verbose diagnostic logging when central admin is being a troubled soul this command can be used in the PowerShell command window.
Set-SPLogLevel -TraceSeverity Verbose -EventSeverity Verbose -verbose
More info at : http://technet.microsoft.com/en-us/library/ee748656.aspx#section3
Take care for now.
Update
Thought I might as well put this in here too. If you want to update in STSADM you can with:
stsadm -o setlogginglevel -tracelevel verbose
SharePoint your lives away.
