In A Productivity Hack for Short-Term Goal-Setting - Part 1 of 2, Jen Amos introduces the topic of productivity and shares a productivity hack for setting goals. She mentions her background as a military kid and the challenges of setting long-term goals in an unpredictable life. She recommends using a digital app like Trello or physical materials like post-its or a notebook to create a three-column system for organizing tasks. The columns are labeled "now," "next," and "not yet."