My lessons from prelims failure
40% of the qns can be answered through intelligent guessing only. So do more quiz, tests, analyze mistakes and learn from answers. Practice more and analyze logically. Keep a note of all answers(which are done wrong), revise it frequently.
It's not about reading additional sources/books. static or current topic, practice qns on that topic. This is in addition to revising ur static books, ncerts and pyqs.