The search process is recursive--you'll do one search, choose the best resources, and search again using the knowledge you gained from the search before. You can assess the strength and value of your keywords and refine the results all from the page displaying your list of results. The goals of this stage of research are:
Explore the image below -- mouseover the targets to learn more about the process of refining your results.
This example comes from Searchbox, but the techniques can be applied to any library database.