In many ways, the hardest part of research is not the writing, it's not the research itself, it is choosing what you want to write about. Some tips for choosing a topic:
The following sources are all browsable and can help you get some ideas for your papers. They all also give you general information on a topic and provide some ways to help you refine your topic:
The word "AND" can help you combine terms to narrow your topic to a manageable one. When you combine two terms with AND, you are telling a database to look for information that contains BOTH of your terms; in other words you are looking for the area in which the two separate topics intersect.
If you find that you are not retrieving a sufficient number of results, your search may be too narrow. Try broadening it using the word "OR." When you use "OR," you are telling a database that it should return results with EITHER word in it; you do not care whether the two words are related in any way.
Sometimes you will find, while doing your research, that two concepts intersect in surprising but irrelevant (to your research anyway) ways. The word "NOT" can help you eliminate the irrelevant concept from your results. When you combine terms using "NOT," you are telling a database to not bring back any results if they have the second term in them. Use NOT cautiously as you can actually get rid of relevant results this way.