Candidates can memorize vast amounts of information for UPSC through various techniques. Methods such as mind mapping, flashcards, and mnemonics can effectively reinforce memory retention. Regular revision and spaced repetition also play crucial roles in solidifying knowledge over time. Additionally, transforming information into visual formats or summarizing content in one's own words fosters a deeper understanding, making recall easier. Alternatively, group studies can promote discussions that enhance comprehension and memory, helping candidates to retain critical information necessary for the exam.