Aspirants can effectively summarize large volumes of information by employing techniques such as outlining, chunking, and synthesizing key concepts. Creating concise notes that capture main ideas and critical details facilitates quicker recall. Using bullet points and diagrams can help in organizing information visually for easier understanding. Practice in paraphrasing and using mind maps fosters deeper engagement with the material. Establishing a habit of reviewing and condensing notes regularly aids in retention and retrieval during the preparation process for the UPSC exams.