How do I stop/freeze my secondary display? I'm fairly new to Mac and having a dual monitor setup, but I have my secondary display working and arranged above my laptop. I want to be able to move between screens on the laptop and have the secondary display on the TV freeze on that document so that I can read what else I need to search for. I have tried turning 'Mirroring' on and off but it doesn't seen to stop the secondary display.

I am on Mac OS X 10.7.5 (MacBook Pro 13" Late 2011)
If you're referring to full screen applications, there's no fix for that at the moment. You'll always have a grey screen on one of your displays when you switch applications. OS X 10.9 is rumored to have a fix, but obviously that's no guarantee. Your best bet is to wait until June 10 when the WWDC announcement comes through.