DO prepare for the meeting. Bring copies all of your forms and all your document originals. You should be able to respond to questions about your forms without extensive referencing and confusion.
DO be prepared to answer personal questions if you are at an interview related to your marriage to a U.S. citizen.
DO follow the directions of the USCIS officer. If the officer wants to interview you and your spouse separately, that is perfectly appropriate.
DO listen carefully and answer only the question that the officer asks you.
DO bring an interpreter with you if you do not understand English.
DO dress appropriately for the occasion. This is an important meeting for you, and a good impression can't hurt.
DO remain calm. If you don't understand the question, ask the officer to rephrase it. If you really do not know the answer to a question, it is better to admit ignorance than make something up. It also helps to be prepared. If you know there is a part of your application that will raise suspicion, practice a truthful response.
DO show up on time. USCIS officers are notoriously difficult to reach and requests for changes in interview times are not well received. If you fail to show up for your appointment, you may have to endure a lengthy process to get another interview.
DO hire an attorney to accompany you if the thought of going through an interview alone is too overwhelming.
DON'T joke around with the USCIS officer. In particular, avoid joking or sarcasm related to drug dealing, communicable diseases, bigamy, or smuggling people into the country.
DON'T argue with your spouse or other family members in the middle of an interview. Agree before hand on what you will do if a disagreement arises during the interview.
DON'T argue with the USCIS officer. If the USCIS officer says part of your application is incomplete, ask for an explanation and attempt to remedy the situation by using the documents and forms you have brought with you.
DON'T lose your patience with the USCIS officer and refuse to answer questions. Questions that may seem inappropriate or unimportant to you are probably within the boundaries of what is allowed by USCIS policy. Just remember what the pay off is for going through with the interview.
DON'T lie to the USCIS officer. If you feel you have something that would be difficult to explain, hire an attorney. Your attorney should be able to defuse difficult situations during an interview.
List prepared by Findlaw for the Public (www.findlaw.com)