Trello's Power-Ups have transformed the technology writer's freelance business by providing tools to manage time, automate repetitive tasks, access files, customize workflows, and track time. The writer uses Trello's Calendar view to prioritize projects, Zapier to automatically add new projects to their board, Google Drive to instantly find necessary files, Custom fields to customize card layouts, and TimeCamp to track time on projects and generate timesheets. These Power-Ups have significantly boosted productivity, organization, and mental clarity for the writer, enabling them to focus on high-value tasks and grow their business.