This is another easy and useful one; I find it helpful when I'm recording content and adding it as I'm going.  I don't really want the word "New" next to some things and not next to others.  The finalized recordings look better if that's never there.  Here's the simple PowerShell script that you can run per web application to disable the "New" icon.  If you've got multiple web applications, look into wrapping it up in a loop and go nuts!

$webApp = Get-SPWebApplication http://sharepoint2010
$webApp.DaysToShowNewIndicator = "0"
$webApp.Update()