GSIs often encounter accessibility as a set of requirements handed down after a course is already underway, but many of the most meaningful accessibility decisions happen in the day-to-day work that graduate instructors actually control: discussion facilitation, assignment instructions, slide design, communication with students, and office hours. In this interactive workshop, participants will explore how to integrate accessibility thinking into these everyday teaching practices. Drawing on universal design for learning principles and real scenarios from GSI teaching contexts, we will work through cases where accessibility needs arise and consider how small, proactive choices can prevent barriers before they form. Participants will leave with concrete strategies for making their teaching more equitable, not as a compliance checklist, but as a core part of effective instruction.