Essential skills for success in the UPSC Civil Services Examination include strong analytical abilities and effective communication skills. Candidates need to develop a solid foundation in general knowledge and current affairs, along with excellent time management for optimal exam performance. Critical thinking and problem-solving abilities are essential, particularly in navigating case studies in ethics papers. Furthermore, adaptability to changing formats and questions is vital. Candidates must also practice writing concise and coherent answers under pressure, as it enhances performance in mains examinations.