To create mind maps for visualizing complex topics for UPSC, aspirants should begin by identifying the central theme. They can branch out into major subtopics, adding keywords or concepts relevant to the theme. Using colors and icons helps in differentiating between ideas, making memorization easier. Candidates should continually refine their mind maps as they learn, incorporating new information and making connections between concepts. Utilizing software tools or online platforms can further enhance the clarity and accessibility of their mind maps, rendering complex subjects manageable.