Diversify the experts say. Get out of your comfort zone. Try writing something totally different.
Well, I did. I did an interview. Having never done one before I scoured other interviews trying to come up with pertinent questions, things that readers will find of interest. I guess it worked. The author I conferred with loved the finished product, said it was wonderful. She was probably happy because it was a mixture of her personal life and plugs for her new and past books. But that's ok for that's what it was suppose to be. I was trying to get people to know her and her writing a little better.
I was surprised how easy it came together. We did it all by email. I asked for some personal background. Then I sent her some questions using that and other sources. She returned her answers which I then copied and pasted into a coherent article. Let her look at it for final approval and Voila! we had an interview.
I'm glad it was easy because I promised to do the same for eight more people. : )