You have the right to remain silent, to consult with an attorney, and to be free from unreasonable searches and seizures by law enforcement. These are you constitutional rights that you have every right to assert when you have an encounter with law enforcement.
First and foremost, remain polite and calm. Provide your identification, car registration, and proof of insurance. Politely refuse to answer further questions. Perhaps most importantly, do not consent to any search of your person, your property, your residence or your car. Do not answer any questions about whether or not you own any property. Remember, if you are not under arrest, you do have the right to leave.
State clearly, calmly, and politely that you:
Refuse to waive your right to remain silent.
Refuse to waive your right to an attorney.
Refuse to waive your right to be free from unreasonable searches and seizures.