To ensure unbiased research during UPSC preparation, candidates should employ critical thinking and diversify their sources. While studying, utilizing multiple perspectives from academic journals, government reports, and reliable media outlets helps to counteract personal biases. Keeping a research journal can aid in tracking sources, noting varied viewpoints, and reflecting on one's assumptions. Engaging in discussions with peers can also challenge biases and broaden understanding. Furthermore, maintaining a focus on verified facts rather than opinions aids in achieving objectivity, providing a balanced viewpoint necessary for well-rounded preparation in civil services.