One of the biggest mistakes students make in CUET UG preparation is ignoring NCERT and relying too much on extra study material. Since most questions come directly from NCERT, skipping it can weaken your foundation. Another common mistake is not practicing MCQs regularly, which affects speed and accuracy in the exam. Many students also avoid mock tests or take them too late, missing the chance to understand exam pressure and time management. Poor revision planning is another issue—students often study new topics but forget to revise regularly, which leads to low retention. Lastly, inconsistent study routines and last-minute cramming can reduce performance. A balanced approach of NCERT study, regular practice, mock tests, and proper revision is essential to avoid these mistakes and perform well in CUET UG.