Candidates can enhance the retention of information through several effective strategies. One key method is the use of active learning, which involves summarizing, questioning, and teaching others. Employing mnemonic devices can aid in memorizing complex information, while techniques like the spaced repetition method can reinforce knowledge over time. Additionally, integrating visual aids, such as mind maps or charts, helps in associating concepts. Regular self-assessment through practice tests can also help gauge retention. Furthermore, maintaining a consistent study schedule allows information to be internalized effectively, ultimately improving performance in the UPSC examination.