Do I NEVER shut it off…?

I forget to mention if you have the digital card it will take much longer 
to warm up, my brothers  does not.

Yes, leave it on all the time, so that when the power bounces on and off due to a quick summer thunderstorm you can haul the smoking carcass of your amp back to the manufacturer so they can charge you big bucks to replace every component inside.  The best advice was to turn it on an hour before listening - the rest of it is elitist audiophile hogwash.

@jnorris2005  
  +1
  Yep! 

IME SS amps sound best when left on continuously. I listen to my system at least a few hours daily (usually more) so leave the amp on unless I'm out of town for a few days or we're having thunderstorms in the area.