Techniques that can aid in memorization for the UPSC exam include using mnemonics, visual aids, and spaced repetition. Developing conceptual maps helps illustrate relationships between different subjects, promoting better retention. Engaging in regular revision sessions enhances recall abilities, while summarizing information in your own words can facilitate deeper understanding. Additionally, employing techniques like the PQRST method or teaching concepts to others can reinforce learning, making it easier for aspirants to memorize essential facts crucial for success in the exam.