In my opinion all new plasma's are ready to use,So i would not recommend you break in slides,and never leave any electronic gadgets unattended ! So if you have a BD player and few BD movies try to play them when you are around it.I have a panasonic plasma 50 inches V series asian edition.I started using break in slides as they have all suggested.And at the end of day One,i could see mild patches of dim red & greenish yellow here & there.And from the following day i stopped using slides and started watching movies.Now those stains have all disappeared.So it would be safe to watch Hi def movies in zoom 1 mode with contrast around 50,brightness & colour to your preference.And colour temperature at normal or cool.
And also don't push your display panel to work 24x7.Let the panel age gently & gradually by regular use.
Let us all keep one thing in mind is that even if your put in 100 to 200 hrs of break in slides,the plasma panel is still susceptible to IR & burn-in from static images.So there is no point in wasting your time & electricity to age the panel.And also reaching half life of the panel much sooner.In the name of aging one should not age the life of the panel by keeping the unit on for a week or so.
So what iam suggesting here is use the tv with Hi def content that which fills the screen fully(no black bars) this is sufficient.You can even watch HD DTH broadcast,provided it does not have shares or news stickers running on it.And also can watch channels where they keep constantly giving breaks for adds,during which there must be no channel logos...
Since i have started watching channels in this way and i have no I.R.