Before starting your research, it's important to develop a search strategy. This is an organized approach for gathering information to help you find the most appropriated resources for your topic and save you time.
This short video from Suffolk Community College describes the process.
To get an overview of your topic, you can start with encyclopedias; a couple online encyclopedias available through the Library are linked below. You could also look for overviews in one of the other library databases or on the World Wide Web.
In order to choose the right search strategy to match your topic, you need to know how the information cycle works. This video, from the University of Illinois, describes how information is created and is built upon over time. The type of information you need for your research depends upon your specific research goal or topic and will determine whether you decide to search through the library, through the Web, or through a different avenue (for example, personal interviews).
Now that you know about how information and knowledge are created over time, you can choose resources that best match your topic.