Critical study habits for UPSC exam success include creating a structured study schedule, maintaining consistency, and leveraging a mix of study materials. Candidates should prioritize understanding over rote memorization, focusing on conceptual clarity in subjects like polity and economics. Regular self-assessment through mock tests enhances retention and identifies knowledge gaps. Moreover, engaging in group discussions promotes different viewpoints, enriching the learning experience. Balancing study with adequate rest and mindfulness techniques enhances mental acuity, which is vital for this competitive examination.