Do a self-interview (wherein you pose yourself questions and then fully answer them) on what you’re interested in writing about. Let each question follow up on something specific in the prior answer, clarifying or challenging it. Part-way through the self-interview, allow your Questioner and Answerer selves to slide into two fictional (or nonfictional, borrowed) people’s voices.
Then write a new stream-of-consciousness passage in one of those person’s mind. Perhaps follow them as they leave the interview, or as they wait in line at the grocery store.