Techniques to enhance cognitive processing for complex UPSC questions include employing active recall, spaced repetition, and mind mapping. Active recall encourages participants to retrieve information from memory, strengthening retention. Spaced repetition schedules review sessions at increasing intervals to reinforce long-term memory retention. Mind mapping helps visualize connections between concepts, facilitating easier understanding and recall. Additionally, engaging in discussions and teaching concepts to others can further reinforce learning. By employing these techniques, aspirants can improve their analytical and problem-solving skills, thus better preparing for intricate UPSC questions.