How should I plan to complete my 11th and 12th portion for NEET 2017 by January?

First, you need to go through previous year papers to check the exam pattern and level of questions. So, you have a clear idea of important topics. Focus on NCERT books and solve all the questions from NCERT. Physics: Oscillations and Waves, Magnetic Effect of Current and Magnetism, Electronic devices, Kinematics, Heat and Thermodynamics, Electrostatics and Current Electricity. Oscillations is an extremely important topic, fetching a huge weightage every year. Take care to be thorough with these! Chemistry: Organic Chemistry (IUPAC nomenclature is a key type of question), Chemical Bonding and Molecular Structure, Coordination Compounds, p-block elements, Equilibrium, Biomolecules, Aldehydes Ketones Carboxylic Acids, Alcohol Phenol Ether and Chemical Kinetics. Also, questions from quantitative analysis are frequent, and they catch students off-guard. Just remember that they can be solved by using basic titration methods! Biology: The Living World, Biological Classification, Chemical Control and Integration, Principles Of Inheritance And Variation, Molecular Basis Of Inheritance, Cell and Sexual Reproduction In Flowering Plants.