Key aspects of personal development crucial for UPSC candidates include building discipline, time management, and stress resilience. Mastering these skills creates a conducive study environment and contributes to overall emotional and mental well-being. Candidates should cultivate effective communication skills, which are vital for interviews and group discussions. Additionally, cultivating a habit of reading and critical thinking can enhance understanding of complex topics. Developing these skills holistically shapes candidates into well-rounded individuals ready to tackle both the exam and responsibilities as future civil servants.