Candidates can use various methods to effectively revise for the UPSC Civil Services Examination. Firstly, a structured revision plan, organized by subject and topic, helps manage the vast syllabus. Techniques such as active recall and spaced repetition improve retention and understanding. Regularly revisiting previous years' question papers helps familiarize candidates with the exam format, while mock tests assess preparation levels. Additionally, summarizing key concepts in notes or mind maps aids in quick revisions. Engaging in group discussions can also provide diverse perspectives and enhance understanding of complex topics.