When doing research, use caution in choosing your sources. You need to determine which sources are more credible than others and attempt to use a wide variety of materials. The broader the scope of your research, the more impressive and believable your information. You should draw from different sources (e.g., a variety of magazines--Time, Newsweek, US News & World Report, National Review, Mother Jones) as well as different types of sources (i.e., use interviews, newspapers, periodicals, and books instead of just newspapers). The greater your variety, the more apparent your hard work and effort will be. Solid research skills result in increased credibility and effectiveness for the speaker.