Simon,
Much controversy as to whether you need to do the 100 hour break-in.
My advice would be to immediately bring down the brightness and contrast levels
If you do a Google Search for VT30 calibration settings you will probably come
up with some suggested settings.
You can watch a few letterbox movies at once. I am certain you will turn the
TV off at some point during the day. As far as gaming, just be careful not to
keep anything static on the screen for extreme periods of time.
Really, I would not be concerned about burn-in with normal use.