Effective memorization techniques for UPSC preparation include the use of active recall and spaced repetition. Active recall encourages candidates to retrieve information from memory, reinforcing retention through practice. Utilizing flashcards can be an effective way to implement this method, prompting self-testing on key concepts. Meanwhile, spaced repetition focuses on reviewing material at increasing intervals, which enhances long-term memory retention. Additionally, summarization and concept mapping can help candidates organize information meaningfully. Employing these techniques creates a structured framework for tackling the vast syllabus and ensures critical topics are solidified in memory.