Its very important time for students,From now you should start working hard.
for 12th standard most effective and possible way is
besides school and coaching hour you should give 4-5 hour in your home for IIT JEE Prepration.
and for the rest of your board subject except(P C M) you can give 2 hour per day
I will suggest you to first revise your old notes in the same order as you was tought in coaching.
also refer good books of that topic. then solve standard question from books and IIT study material
and after finish the topic solve question of that topic from previous IIT JEE papers.
I will also suggest you to join test series.it will help you a lot for you prepration.
you can join online test series it will save your time.
Here i am maintioning few chapter .prepear well these chapter because more question were asked from these chapter.
calculus, Vectors, Complex numbers, co-ordinate geometry(2D+3D) Quadratic equations.
Optics, Modern physics, Thermodynamics, A/C circuits, Fluid mechanics, Experiments.
Solid state, chemical bonding, Aldehydes, ketones, carboxylic acids, Alkenes,
alkynes, stereo and geometrical isomerism, transition elements, coordiantion compounds,
electro chemistry, kinetics and equilibrium.
Prepear all topic and give more stress to above topics.
Just stay calm and focus on understanding rather than mugging. Be regular in class and stay with concepts.
Please feel free to post as many doubts on our discussion forum as you can. If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
We are all IITians and here to help you in your IIT JEE preparation.
All the best.