As a freelance writer myself, I know how important it is to have, and keep track of, experts to interview. Here are a few ideas on the topic:

I always emphasize to clients and seminar participants how important it is to start and maintain a "Team 100" list -- people to support you in whatever you are doing. It is also equally important to start and maintain "Expert 100" list. For a writer this is almost mandatory whether fiction or nonfiction. However, even if you are a business owner or an employee it is just as important to have this list. One of the experts might be your next employer or a friend of one.

What is an Expert 100 list? Group of people who are experts in their careers who you know a little or a lot that you feel comfortable enough to contact them if and when you have questions in their area. It doesn't matter whether the questions are for your business or for your writing.

There isn't a right way to track your list--computer or index cards. MS Excel handles the process well. MS Access offers an easy-to-set-up template that needs minor tweaking. Outlook is a possibility as well, however, the file corrupts easily. I began in Outlook, moved to MS Excel, and now use Access. Even with never using Access before, I walked through the learning curve in less than an hour.

Where to Begin Your List? Take the easy route; make a list of friends, family, significant other