Follow these steps to get your desired result :

1.Prepare a timetable and strictly follow it :

Time-Table helps you to plan the short-term and long-term goals accordingly. Take short breaks in between.

2.Revise your subjects regularly:

The revision would help you to get a good grasp of all the concepts.

3.Solve previous year questions:

Whether you are preparing for any exam, your preparation is incomplete without solving previous years' papers.

4. Study Material-

Collect the relevant study material to prepare for NEET. Once you get good study source, stick to it and follow it completely. The NCERT textbooks for Class 11 and 12 are recommended as the best books for NEET preparation.

5.Evaluate yourself:

Evaluating yourself from time to time is crucial for effective preparation. Attempt mock tests to evaluate yourself.

Good luck !