Effective strategies for summarizing and consolidating vast study materials include creating mind maps and concise notes, which distill essential information into easily digestible formats. Regularly practicing active recall and spaced repetition can enhance memory retention. Additionally, developing flashcards for key concepts allows for quick reviews. Using visual aids and ensuring periodic revisions helps to reinforce knowledge, while group discussions can clarify doubts and deepen understanding, streamlining the process of information consolidation during UPSC preparation.