Effective memorization techniques essential for the UPSC include the use of mnemonics, mind maps, and regular revision. Creating visual aids helps condense information into digestible formats, aiding recall. The spaced repetition method also proves beneficial; it involves revisiting information over progressively longer intervals to enhance retention. Furthermore, engaging in active learning strategies, such as teaching concepts to peers or summarizing topics, reinforces memory. Flashcards are another useful tool for quick revision. Incorporating these techniques into a structured study plan can significantly improve memorization of crucial concepts.