As there is nothing yet announced for NEET 2018 syllabus but as per previous year information below provided topics are considered to be most important so it is advisable to focus them all properly -

Biology – Genetics, Ecology & Environment, Cell Biology, Morphology, Basics of Biotechnology, Reproduction, Physiology of Animals & Plants.

Good Luck!!!

Hi Sid Patil

Chemistry

Inorganic Chemistry carries a weightage of 34 %. Among all the units, Chemical Bonding and Molecular Structure carries the maximum weightage of 29.4%. All the major important topics are covered in this section. It is then followed by Co-ordination compounds from which nearly 17.6% of the question were asked on average from this unit. 

Organic Chemistry carries the maximum weightage of 35.6%. From this, nearly 30  % (assuming total 100%) of the questions from previous year paper were fromOrganic compounds containing Oxygen.  Basic Principles of Organic Chemistry is the second most important chapter and thus carries a weightage of 24.4%. 

This unit was given high importance in NEET 2017 exam. Accordingly, this unit carries 30.4% weightage.(Assuming total 100%) Among all, States of Matter and Solutions (24.1%) is the most important of all followed by Equilibrium (18.2%).  Rest of the questions were asked from the different chapter covering Chemical Kinetics and Nuclear Chemistry (14.6%), Thermodynamics and Thermochemistry (13.1%) and others. 

Physics

last year trend was

BIOLOGY

All chapters are important. try to stick to NCERT.