Taking good notes during the interview is of the utmost importance. That way when you review them, you can notice trends and patterns that will inform you further about your audience's behavior.

Keeping these notes is important so that you can return to them at any time if you forget specific answers. It is also important to learn how to pull out the best information from your interviews.

Read through your notes from each interview, and anytime you come across something interesting, highlight it. This is called extraction. As you go through your notes, look for any mention of a need, behavior, or goal and highlight those as well.