There are many ways to come up with a topic to study. Some suggested topics and links are below:
Start by becoming familiar with the annual theme. The 2015 theme is "Leadership & Legacy in History."
This topic suggestion list, compiled by the Minnesota History Day staff, has many ideas to get you started.
Topical Prize Catalog: Prizes are given at the State Event, but the sponsoring organizations have great topic ideas and websites to start research.
Visit the History Topics page on the Minnesota Historical Society website for Minnesota-specific topic ideas.