For the Panny, just take it OUT of Vivid mode and switch to Cinema or Standard. Then, zero out ( meaning center of the adjustment bar) Picture setting and Brightness settings. Avoid black bars on the sides and top/bottom of the screen. Stick with FULL-screen programming / movies.
Do this for at least 100 hours and then break-in will be pretty much good.
LG BP 540
Sony DH550 AVR
Polk Tsi, RSi, Bookshelves & PSW sub-woofer