Effective revision techniques for the UPSC exam include regular self-assessment through mock tests and quizzes to identify knowledge gaps. Utilizing summary notes for quick reviews, along with visual aids like charts and diagrams, can facilitate recall. Creating a revision timetable that allocates specific time slots for each subject, ensuring consistent revision, is essential. Group study sessions can also be productive, allowing discussions and clarifications of complex topics. Prioritizing revision based on exam patterns and focusing on highly weighted subjects can significantly enhance retention and performance.