Choosing a topic is an important part of the research process. Make sure to choose a topic that is interesting to you. Your topic should be reasonably narrow and clearly defined. As you begin your preliminary search, if you are not locating enough material you can broaden your topic or narrow if you are finding to much. Keywords within the literature can help you with this.
Reference ebooks (ex. encyclopedias, handbooks) are a great place to start for background information on your topic. They can also help in choosing and narrowing your topic. eReference for psychology can be found in the following databases.
Here are examples of books you'll find: