Time is less, so we might as well just focus on the quality rather than the quantity.

No shortcuts to hard work- In fact you have to give it your everything, since you are bounded by a time limit.

A planned direction for your hard work- If your hard work is without any direction then the work done will be a waste.

In depth Analysis of selected topics- Analysis of everything you do is must. It will give you an idea about your weaknesses and strengths. If you have to crack jee mains in 10 days, It is the most important thing to do, so that the selected topics are bulletproof!

Positive attitude- Because negativity will result in nothing but depression and ultimately deviation of focus. It is equally important to be psychologically strong.

Hello Mohit,

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You can focus on important topics which carries more weightage in the exam.
Below are the important topics for the exam with weightage-
"PHYSICS :-
THE MOST IMPORTANT CHAPTER ( DO OR DIE ) CHAPTERS
    Electrostatics - around 9%
    Heat and Thermodynamics -around 8%
    Rotational Motion -around 7%
    Wave Motion -7%
    Laws of Motion -around 6%
    Simple Harmonic Motion -around 5%
    Wave Optics-5%
    Units Dimensions and Errors -around 4%
    Work Power and Energy -around 4%
IMPORTANT TOPICS (Should do) CHAPTERS
    Modern Physics -around 4%
    Current Electricity -around 4%
    Electromagnetic Induction -around 3%
    Physics of Nucleus -around 3%
    Fluids -around 2%
    Gravitation -around 2%
    Elasticity -around 2%
    Solids and Semi conductor Devices -around 2%
    Center of Mass , Momentum and impulse -around 2%
    Kinetic gases -around 2%
    Radioactivity -around 4%
IF YOU HAVE TIME GO THROUGH THESE TOPICS
    AC,
    EMW (Electro Magnetic Waves)
    Vectors
    2D
    Circular motion
    Capacitance
    Kinematics
CHEMISTRY:-
DO OR DIE CHAPTERS
    General Organic Chem -around 9%
    Alcohol Phenols and Ethers -around 7%
    Redox Reactions -around 6%
    Chemical Bonding -around 5%
    Coordination Chem -around 5%
    Inorganic Chem -around 10%
    Aldehyde and Ketones -around 5%
    Solutions -around 5%
    Solid State -around 5%
IMPORTANT TOPICS
    Chemical Thermodynamics -around 5%
    Ionic Equilibrium -around 3%
    Chemical Equilibrium -around 3%
    Surface Chemistry -around 3%
    Periodic Classifications -around 2%
    Atomic Structure -around 2%
    Metallurgy -around 2%
    Gaseous State -around 2%
    D and F block -around 2%
    Polymers -around 2%
OTHERS:-
    Chemical kinetics
    Biomolecules
    Electro chem
    other organic topics
MATHS:-
Do OR DIE TOPICS
    Probability -around 7%
    Definite Integration -around 6%
    Circles -around 5%
    Vectors -around 5%
    Theory of Equations -around 5%
    Sequences and Series -around 5%
    Complex Numbers -around 5%
    3D -around 5%
    Matrices and Determinants -around 4%
    Differential Coefficient -around 4%
    Sets Relations and Functions -around 4%
IMPORTANT TOPICS
    Application of Derivatives -around 4%
    Trigonometry -around 5%
    Parabola -around 3%
    Limits -around 3%
    Heights and Distances -around 2%
    P&C -around 2%
    Straight Lines -around 2%
    Areas -around 2%
    Differential Equations -around 2%
    Continuity and Different-ability -around 2%
LEAST IMP.
    Other Conics
    Binomial Theorem
    Mathematical Induction
    Prop of Triangles
    Statistics
    Pairs of St.Lines
Try to go through previous year papers to understand the exam pattern and level of questions asked in the exam. For practice you can solve as ,many as MCQs .