In the process of readying my website for last week's book launch, I talked with friends and colleagues about the concept of user interface.

Whitney Hess, a user experience consultant, shared her insights with me about this site. She co-authored the post with me, and does brilliant work on this topic. (You can read her most recent blog post, and discover the mantra that has helped to shape her career, here.)

My recent Harvard Business Review post includes some insights from those conversations. I'd love to hear your thoughts about what components are most necessary for a customer-friendly user interface, whether for human-computer or human-human interaction.

Feel free to share your thoughts here or on the post at HBR.