The best way to keep track of source materials, besides entering them in your research log, is to save a copy of each potential source as you conduct your research. Many database services will allow you to e-mail, save, or print citations or full texts of articles, and you can easily download, copy, or take screen shots of information from the web.
Working with electronic files, photocopies, or printouts—as opposed to relying on memory or hastily written notes—has several benefits:
Information to collect for a working bibliography
Maintaining a working bibliography
Creating an annotated bibliography
Avoiding plagiarism with careful note taking
Avoiding plagiarism from the web