Sources such as encyclopedias and hot topics databases can be good places to get a sense of what some of the areas of interest within your topic are.
Discover literature from core disciplines in women's studies and the latest scholarship in feminist research. Search womens literature and selected bulletins, reports, dissertations, NGO studies, and grey literature. NISC produces the index.
Try concept mapping to organize your thoughts and refine your topic as you search. There are a variety of free tools you can use. Start with a basic topic or subject and think about various issues related to that topic. If you are researching a specific person, you might include branches for their childhood, education, career, etc. and then add off-shoots for accomplishments and challenges.