Determine your exact purpose, and be sure it relates to your research question and hypothesis.
Set up the interview well in advance. Specify how long it will take, and if you wish to record the session, ask permission to do so.
Prepare a list of factual and open-
Even if you are taping, take notes.
If you are taking notes on paper, leave plenty of space after each question. If the interview proceeds in a direction that seems fruitful, don’t feel that you have to ask all of your prepared questions.
Record the subject, date, time, and place of the interview.
Ask your interviewee for permission to use video, audio, or quotations that will appear in print.
Thank those you interview, either in person or in a letter or email.