Ask HN: How do I become a better interviewer?

Pretty much everyone agrees that interviews are a terrible measure of fit for a job role. I frequently see articles that discuss strategies for getting better at being interviewed or solving interview questions.

However, I can't help but think part of the problem with interviews is that we lose sight of the fact that interviews are a two-way street between the interviewer and the candidate.

What qualities do good interviewers share? What resources informed the way you interview now?