You can have it done professionally. Look for someone who is ISF certified. It could cost as much as $135 or more per input, but you get quite a bit of value for the money.

They will check the white level to verify the color temperature is correct for the setting. They will adjust all five of the user picture controls, then calibrate them using the service menus so the calibrated settings are default, so it's easy to return to the correct calibration if they get changed. They may also recommend environment changes such as back-lighting, viewing angle, or distance for best viewing.

You could also one of the many calibration discs available. They're pretty easy to use and many are tutorial-driven. Most explain the control, what is does and how to calibrate it. They use plain talk so it's pretty easy to follow. I like this method for calibrating a DVD/BD player because it takes into account the player itself and the cabling. With so many DVD players having their own picture adjustments calibrating the TV input for the DVD/BD doesn't always guarantee a calibrated playback since the player's controls may be out of spec. These are pretty reasonable costing between $25-$50, are re-usable, and easy to use.