Planning skills essential for balancing multiple subjects in UPSC preparation include effective time management and organization. Candidates should create a study schedule that allocates specific hours for each subject, ensuring comprehensive coverage. Prioritizing challenging topics while regularly reviewing easier ones maintains a steady learning pace. Utilizing active learning techniques, such as summarizing and self-testing, enhances retention across subjects. Flexibility in the plan allows adjustments based on progress, promoting adaptation to personal learning styles. Moreover, maintaining focus and discipline amidst varied subjects is crucial for achieving a well-rounded understanding for the exam.