Candidates manage stress during the long preparation for UPSC exams through various techniques. Regular exercise and physical activities can help release built-up tension and improve mood. Practicing mindfulness or meditation can also aid in maintaining focus and reducing anxiety. Setting realistic goals and breaking study material into manageable portions prevents feelings of overwhelm. Additionally, engaging with peer study groups provides emotional support and accountability. Lastly, ensuring a balanced lifestyle, including adequate sleep and nutrition, is crucial for sustained mental well-being throughout the preparation journey.