Heyy Sukh....

Visit below link to know the chapter wise weightage of each subject and study accordingly : 

https://medicine.careers360.com/articles/neet-chapter-wise-weightage-and-important-topics

Aslo get previous year questions with detailed solutions and NEET question bank in below link , hope it helps : 

https://medicine.careers360.com/articles/neet-question-paper

Hello,

Here are some important topics

Biology

• Human Physiology
• Human Reproduction
• Biotechnology
• Cell Biology
• Genetics

Chemistry

• Chemical Bonding
• Whole Organic Chemistry of Class 12

Physics

• Waves and SHM
• Modern Physics
• Thermodynamics
• Magnetism

These are only some of the topics with a good weightage. You would have to do the other topics as well to score good marks.

For more info i would suggest you to visit career360's tab where a detailed explanation is given.

Link for the same is:https://medicine.careers360.com/articles/neet-chapter-wise-weightage-and-important-topics

Hope this helps and all the very best to you!