There are certain things you should and should not do if you are arrested.
DO NOT make statements to the law enforcement officer in the belief that if you cooperate the officer will let you go (it is already to late once an arrest has occurred).
DO speak only with your attorney about the matter - do not discuss it with anyone else
DO NOT answer questions asked by law enforcement officers or other officers of the court, unless advised to do so by your attorney.
DO have your attorney present during any lineup or administration of a test (such as drawing a blood sample for further testing)
DO be polite to law enforcement personnel; they can make a bad situation worse if you make them mad at you.