You should prepare civil services examination calls in terms of quality and not quantity. You should target two subjects every day. Most of the top rankers start preparing for the exams right from their school days, as most of the questions are asked mostly from Class 6 to 12 standard books. So preparing notes and devoting 10 to 12 hours before a year of exam is believed to be sufficient.
Find the weak and strength in the subjects and accordingly work on it.
