To improve critical thinking for the UPSC exam, techniques such as engaging with analytical essays, participating in debates, and solving analytical puzzles can be beneficial. Regularly analyzing current affairs and understanding different viewpoints on issues encourages deeper insights. Candidates should also practice creating outlines for essays that showcase multiple perspectives on a topic. Reflecting on past mistakes in practice papers helps identify thought patterns that require improvement. Additionally, discussing complex topics with peers can spur creative problem-solving and analytical skills, vital for success in the examination.