The best study material for CUET 2025 includes NCERT books for fundamental concepts, subject-specific guides by reputed authors like R.S. Aggarwal for Quantitative Aptitude, T.S. Grewal for Accountancy, and Arihant or Oswaal for CUET-specific preparation. Additionally, solving past year papers, taking online mock tests, and referring to CUET sample papers can help candidates strengthen their preparation.