To improve retention of facts related to Indian geography for UPSC, candidates can employ various methodologies. Utilizing visual aids like maps and diagrams aids memory retention, while creating short summaries can distill essential information. Engaging in active recall by quizzing oneself often reinforces learning. Group study sessions encourage discussion, helping candidates to articulate and solidify their understanding. Additionally, associating geographical facts with current affairs or historical events can provide context, enhancing the relevance of the content. Hence, developing a multi-faceted approach can make geographical facts more memorable.