Common mistakes made by UPSC aspirants during preparation include inadequate time management, leading to last-minute cramming and anxiety. Relying too heavily on a single source for information can create knowledge gaps. Ignoring current affairs or failing to connect theoretical knowledge with practical applications is another common pitfall. Moreover, neglecting regular revision can hinder retention of information. Some candidates may underestimate the importance of the interview stage, focusing solely on written exams. Lastly, poor health management due to lack of exercise or proper diet may affect concentration and performance in the long run, so balance is essential.