According to my view, to fail in UPSC examination, the main cause of failure is to forget to brush up the basic skills. In UPSC exams the students approach is also checked. One should never ignore the NCERT books. Every student must include it in his / her preparations. Lack of revision, lack of proper planning and guidance, lack of mock-tests, lack of passion.
I will suggest the students to take it seriously and to be regular with studies. Study the syllabus carefully and don’t leave anything. Planning is the first step to go further. There is lot of material for preparation. The only thing is to select it carefully and make notes. Try to understand and make notes. There is no need of any disappointment or any confusion, go ahead.