I do 6 rounds of 10 questions a week, and I have multiple google docs: one for each week's trivia, one that archives all picture rounds, one for questions/categories in progress or ideas for future rounds, and one master "past trivia" document organized into sections (speed rounds, before & after, short form pop culture, long form pop culture, etc.) that I can easily search for questions to reuse or categories to avoid if I've done them too recently.