Effective strategies for compiling and organizing study materials for UPSC include creating a digital repository where resources can be categorized by subject or topic. Candidates should use software for note-taking and structuring notes in an easily retrievable format. Employing color-coding or tagging systems can help prioritize important materials. Keeping summaries succinct yet informative improves accessibility during revisions. Regularly updating the repository ensures relevance and currency. Overall, these methods optimize study efficiency and facilitate systematic revision, crucial for success.