For CUET UG preparation, the most reliable resource is NCERT textbooks (Class 11 & 12), especially for Domain Subjects, as most questions are based directly on them. For extra practice, you can use CUET-specific guides like Arihant or Oswaal question banks and MCQ practice books. For the General Test, basic reasoning and aptitude books such as RS Aggarwal can be helpful. Online, you can refer to educational platforms like NTA official website for syllabus and sample papers, along with trusted learning apps and YouTube channels that focus on CUET preparation. Mock test series from reputed coaching platforms are also very useful for improving speed and exam readiness. Combining NCERT study with regular practice tests and revision notes will give you a strong and balanced preparation strategy.