Background Research: searching and reading a variety of information about your general topic in order to decide where you want to focus your research.
Video courtesy of North Carolina State University Libraries: http://www.lib.ncsu.edu/tutorials/
libnscu (2014, May 1). Picking your topic is research [video file]. Retrieved from: https://www.youtube.com/watch?v=Q0B3Gjlu-1o
Sometimes if you can't think of other words, a subject heading can help.