Common pitfalls in UPSC preparation that candidates should avoid include underestimating the importance of a comprehensive syllabus analysis, neglecting current affairs, and inadequate revision strategies. Many aspirants focus solely on certain subjects, leading to an imbalanced knowledge base. It’s essential to adhere to a structured study plan and avoid last-minute preparation. Additionally, over-reliance on coaching resources can hamper independent critical thinking. Lastly, maintaining a disorganized study routine can lead to burnout or information overload, making it vital for candidates to create a sustainable learning environment.