Best practices for ensuring thorough revision of current affairs in UPSC include creating a structured revision schedule and summarizing information in concise formats. Regularly revisiting topics through flashcards or notes ensures retention and recall. Engaging in group discussions and quizzes can also reinforce learning and identify gaps in knowledge. Following reputable news sources and yearly compilations helps candidates stay updated on essential issues. Consistent revisions build familiarity with current events, enabling candidates to respond effectively during the examination and interviews.