Do your homework. Conduct background research about the subject you are interested in at the library, or on the Internet. For instance, if you are interviewing a Korean War vet, at least be conversant with the major events of that war. Knowing more enables you to ask better questions and will result in a better interview.
Prepare a list of questions ahead of time. Make sure your questions are clear, concise, and open-ended. Avoid questions that can be answered with a simple "yes" or "no." Begin questions with “How” “What” or “Why” and you will generally get a more complete response than questions that begin with “Do” or “Did.” Be sure you get your key questions answered during the course of the interview, but don't be slavish about sticking to the list.
Biographical Questions
What is your name?
Where and when were you born?
Where did you grow up?
Where have you lived? What jobs have you had?
What do you do for a living now?
Biographical Details
Early Days of Service
Wartime Service
War’s End, Coming Home
Reflections