Common pitfalls to avoid during UPSC preparation include inadequate time management and lack of strategic planning. Many aspirants may attempt to cover excessive material without focusing on key areas, leading to confusion and burnout. Neglecting regular revision can result in poor retention of information. Another issue is underestimating the importance of current affairs, which are critical for both prelims and mains. Lastly, failing to practice through mock tests can prevent candidates from grasping the exam pattern. Recognizing these pitfalls enables aspirants to adopt more effective study strategies.