DO: Feel free to ask the officer if you can call an attorney on the phone, and get some advice, prior to answering questions. An ethical and professional law enforcement officer will assist you in this effort, and not feel resentful for your question. However, if the officer gets mad or acts irritated, then you have made the right choice. Never hesitate to call an attorney. It's usually a free call.
Don't: Lie. If you have decided to answer the questions posed to you by a police officer (which you should only do with the advice of counsel), then by all means DO NOT LIE! If you do, in some instances, you could be charged with obstruction of justice, or simply make a bad situation, a lot worse.
When you are asked to provide a statement to police, it is usually a good idea to ensure you are making the right decision. The officer may not inform you of what he/she intends to do, or why he/she is asking you questions. It may not be obvious and you never know where it will go. In most cases, deciding to politely assert your 5th Amendment rights to a lawyer could be the best decision you ever made.