One step the animation did not mention in depth is the work you might want to do with a smart phone or tablet, which is recording, visually, the photos, mementos, and other potential video foootage you might have collected. Once you have complete that step, it's a good idea to go through what you have recorded and log, or mark the timecodes of, both your interview and image collections.
Many producers end up transcribing every word of those they interviewed, while others immediately recognize the memorable bites and log only those. You can place your interview logs into a file labeled A-Roll, and post it in the first "Write It" box. The file holding your visual logs (B-roll) can be posted in the second "Write It" box.