Think about the questions you have about your topic. One way is to think about who, what, when, where, why, and how questions. For example, if your topic is "tacos," your questions might be:
Create a concept map by thinking of all the possible aspects of your topic, and draw the connections between them. You can use a pen and paper to sketch out a map or use an online tool.
Concept mapping tools: Pen and paper, Google Draw, Creately, bubbl.us
Knowing a bit more about your topic is helpful. Reading background information can help you discover a great research question. Some sources for background reading: