Oh yea, from Mrs. Cop----

If ever stopped by the police, turn on the dome light immediately
Keep both hands on the steering wheel or in plain sight
Do NOT reach to the glove box or under the seat until asked for ID, etc, then SAY where it is and what you are going to do
Do NOT get out of the car/vehicle unless told to by the officer
Always do exactly what the officer tells you to, EXACTLY
If there is anything slightly suspicious in the vehicle, such as (in US) a legal gun, SAY SO and where it is.
Stay calm and polite if at all possible
Never ever run from the police--there are more of them than of you
and they WILL catch you. Then it will be worse