In regards to the EVF: I set my cameras to automatically switch LCD/EVF. Then I flip the LCD so that it is tucked in against the body (not visible). In that configuration, the LCD will be turned off all the time, since it's not visible, and the EVF will be on only when your eye is against it. This saves a lot of battery. Also set the camera to shut off automatically (it's in the Economy menu on a GH1, not sure about the GH2's menus).
Obviously there are shooting situations in which I use the LCD; the above procedure is just what I normally do.
Obviously there are shooting situations in which I use the LCD; the above procedure is just what I normally do.