Selecting a topic is the first step. If the choice is up to you, pick a topic that interests you. Think broadly about your topic and do some preliminary research by consulting subject encyclopedias, dictionaries, or handbooks.
Some topics are too broad for a research paper. For example, the topic Ancient Greek comedy is too broad.
You will need to refine or narrow your topic. For example, a better research topic would be the role of women in the comedies of Plautus.
Once you have identified your topic:
Main concepts: women, role, comedies, Plautus
Secondary concepts: female, women, woman,
role, character, characterization
comedy, comic drama, , Plautus, Miles Gloriosus
Once you have identified key terms for your topic, you are ready to shape your strategy for searching catalogues, indexes and databases.
Once you have a basic topic in mind, think about different aspects of your topic and begin to focus on it.