Effective study techniques for mastering the UPSC syllabus include active reading, summarization, and spaced repetition. Utilizing the Pomodoro technique can help maintain focus by breaking study sessions into manageable intervals with short breaks. Practice through mock tests helps reinforce knowledge and builds exam familiarity. Additionally, creating concise notes and mind maps aids retention. Engaging with peers for group discussions can enhance understanding and provide diverse insights, making the vast syllabus more approachable.