Key lifestyle changes essential for maintaining focus during UPSC studies include implementing a balanced diet, establishing a fixed sleep schedule, and incorporating regular exercise. A nutritious diet enhances cognitive function and energy levels, while consistent sleep patterns improve concentration and memory. Limiting distractions by creating a dedicated study space and using time management techniques like the Pomodoro technique can also enhance productivity. Incorporating mindfulness practices such as meditation can further support mental clarity, ultimately leading to more effective study sessions.