Genre SFF authors have no shortage of big ideas, but they can fall into the trap of hampering their writing's impact by sacrificing depth for breadth in their worldbuilding. In this hands-on session, Aleese Lin will show how strategic side character development can effect high-impact worldbuilding without padding word count or sacrificing reader interest. This craft discussion will be paired with an audience-participation exercise and an opportunity for attendees to tinker with their own not-so-small side characters.