Here are the settings I use at the moment. They may do absolutely nothing for you depending on how much your set differs from mine. However, they should be a reasonable starting point. There is some flexibility around these settings as each TV can vary in its output (I've tried to provide some guidance on likely values).
Edit: I use these user menu settings with Freeview, Xbox 360 (Component), PS3 (HDMI), in conjunction with service menu settings adjustments I've made in calibrating my set. I don't think it is worth posting service menu settings as they look like they are very specific to your TV (disregarding environmental factors). If I post them it will be to help aid my explanation of calibration using my set as an example.
Backlight: 30 (increase for brighter colours and increased contrast at the expense of black)
Contrast: 100 (for more info see
here)
Brightness: 44 (up to around 48)
Colour: 40 (down to around 38)
Tint: 0
Sharpness: 0 (or down to around -1 depending on source)
Black stretch: Off (the jury is out on this, but generally should be set to Off)
MPEG NR: Low (or Middle depending on preference)
DNR: Off (or On depending on source)
Colour Temperature: Warm
3D colour management: Off (this will depend very much on your set)
Base colour management: Disabled (as above)
Active Backlight Control: On (for darker blacks, but can be disabled if you want fixed black levels useful for calibration)
Cinema mode: On (where available)
Refer back to this thread for later discussion on settings and their effects.