In order to score good marks in NEET you should refer to NCERT books. It will help you to clear your concepts.

Exercises which are given at the end of the each chapters are very important.

Apart, from NCERT you can refer below recommended books

Physics

* HC Verma (Volume 2)

Biology

* Pradeep's

* Trueman's Biology (Volume)

* MTG (Biology Today) CBSE PMT

Chemistry: 

* ABC Chemistry

* Organic Chemistry: Arihant Publications, Morrison Boyd

*  O P Tandon

* Objective NCERT at your fingertips Chemistry by MTG

You should also refer to previous year papers to know the exam pattern and level of the exams and practice as much as mock test series for your practice.

All the Best!!