Make your interviewee comfortable. Small talk helps!
Bring recording equipment.
Come to the interview prepared.
Push your interviewee to answer questions they do not want to answer.
Be rigid. Continue on conversations of interest and ask questions.
Allow your interviewee to pursue conversations that are off topic.
Driscoll, D. L. & Brizee, A. "Interviewing." Purdue Online Writing Lab. Purdue University. Web. 6 December 2015.
Think about how you might alter the scene being observed.
Will you participate in the event?
Will you interact with the people around you?
How will you record what you observe?
Should you give the people involved time to adjust to your presence?
Driscoll, D. L. & Brizee, A. "Observing." Purdue Online Writing Lab. Purdue University. Web. 7 December 2015.