Ask his opinion on some area related to his expertise or interests. Philippians 2:4 says, "Each of you should look not only to your own interests, but also to the interests of others."
I really value HH's opinion. He sees things from a very different perspective than I do oftentimes. I love that. It broadens my thinking. He has many areas of expertise and interests, but I used this challenge in reverse. I have been a teacher for nine years now. My work world experience has been teaching, and a little bit of babysitting on the side. I have really been talking with him about school situations, and it is awesome getting a perspective that is not from the "school world."