Hello aspirant ,

See physics can only be tackled by regular practice. Number of formulae are limited and only the values or the wording of the questions get twisted each year.Be thorough with NCERT formulae which are a basic fundamental which cannot be overlooked. in physics for theoretical questions as well  NCERT should be followed . Read all the lines no matter how useless they seem as in modern physics. Backside questions should be clear as well.

Chemistry

Physical chemistry , I suggest you use a supplementary book as it has numericals (MTG)

Inorganic chemistry ke liye strictly NCERT and solve questions on that.

Organic chemistry , Most important thing is understanding the chapter BASIC PRINCIPLES AND REACTION MECHANISM  All therl rest of the chapters become cakewalk after this chapter is mastered.. For this need loads of practice so an extra book (MTG).. And no point repeating but NCERT should be clear.

In Biology stick to NCERT , and solve as many questions as hou can . For questions refer NCERT at Fingertips and previous year paper. Diagrams are important as well. 

Refer a module as well, Allen or Aakash and join test series , preferably of Allen. Analyze your scire

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