Effective techniques for retaining information in the context of UPSC include active learning strategies such as summarization, visualization, and the use of mnemonic devices. Maintaining regular revisions through spaced repetition reinforces memory, while creating mind maps can help visually organize complex ideas. Practice quizzes and teaching concepts to peers can further enhance understanding. Additionally, associating information with real-life examples makes it more relatable and easier to remember. Combining these techniques not only strengthens memory retention but also fosters a deeper understanding of the subjects being studied.