There are many factors that go into a successful interview, and the criteria oftentimes differs depending on the role for which you are interviewing. That said, there are certain fundamentals that apply to every interview situation, and are worth an occasional refresher even for experienced interviewers. The article found at the following link provides a overview of those foundational interview do’s and don’ts:
www.linkedin.com/pulse/job-interview-all-time-classic-dos-donts-bernard-marr?trk=prof-post