List potential problems as you read about them in your book. Also be thinking about other problems not mentioned that we should be considering.
Write a journal entry about what you learned from the perspective of your persona. Be "in character" while writing and express some of your concerns & worries in your writing.
Include some of the other personas in your writing to make it feel more real. Publish live and then comment on others' writing.
Man am I worried about all of these problems we're going to possibly face while on Mars! I can't believe I got myself into this! First of all, how can we live if it will constantly be -80ºF, AT BEST! At least we have Francisca Martinez, the meteorologist who can alert us of incoming dust storms. What I worry about with my career is alien disease. If there is bacterial life on Mars, it will pose a huge threat to any humans there.