As an executive recruiter, I emphasize these two important interview tips when coaching candidates.
Be proactive, but don't sell. It is sometimes difficult to resist the temptation to go into an interview and aggressively sell yourself, especially if you are a salesperson with strong persuasive skills.
But what's the point of selling if the opportunity isn't the right job for you?
If you are looking at the dynamic from a long-term perspective, the goal is not to sell the interviewer on hiring you. Instead, it should be to perform a needs analysis with high positive energy to determine whether the job and company are a good fit for your skills and career path.
Conducting the interview this way accomplishes two things: Most important, it raises the odds that you will be happy and successful in your job 18 months from now. It also raises the chances of your getting an offer.
By changing the dynamic from sales to needs analysis, you are helping the interviewers do their job of assessing your fit for the role and organization, and making the interview more productive.
Try not to talk for more than 30 seconds at a time. In 1985, Milo Frank wrote a book, also available as an audiobook, called "How to Get Your Point Across in 30 Seconds or Less." It influenced me personally, because I am prone to going on talking jags.
Frank's point is to think of a conversation as a tennis match, with the goal of returning the ball over the net, rather than a sprint (or worse, a marathon).