Yes Sir! No Sir! goes a long way when dealing with the police.
I have been pulled over for doing 73 in a 55, 74 in a 55, and completly blowing through a stop sign that the police officer was stopped at across the road. All three times I was pulled over to a stop prior to them catching back up to me after pulling a U-ie. All three times I had my registration, proof of insurance and licence ready by the time they got to my window. All three times I politely answered all of their questions. And all three times I was asked to do better in the future and let go... The stop sign occurance was awarded a written warning.
My wife gives the officers attitude and is one ticket from having her licence revoked!