This is actually the beginning of the crucial months of your life. You feel of starting studying a bit more from what you were study months ago. Time is passing away and you realize that there is more to revise more to study and less time to revise. In this type of situation I must say one thing "Chill!!".


By the way I am not sure of one thing I recently visited official website of Maharashtra State Board of Secondary & Higher Secondary Education. I found one link
http://www.msbshse.ac.in/newsite/Sylabus-2011.pdf
I am not sure about one thing is this the syllabus for HSC 2012 or HSC 2013. If you get to know then please comment in this post.

This is the month where I think you should study 75% of your time for your HSC studies and 25% for MHT-CET studies. Your aim is to complete first Physics as this subject becomes nightmare in the end. I have experienced it and many others have so I am telling you. As MHT-CET is based on numerical and theories so a must study is required for HSC(apart from brief answers) is :-

Physics - Proofs, Theorems, Calculations with Log table (as you will be not provided with calculators during exam. Logarithmic Calculations like like log, anti log, squareroot, cuberoot etc..) Buy Navneet Log Book if you haven't buyed them yet. Also try to solve HSC numerical as there are some numerical where HSC proof knowledge is to be shown.

Chemistry - Again same as in Physics but in addition to that practice the chemical reactions by actually writing them(only the tuff ones and proof based chemical reactions and also the frequent one which comes in board exam)

Mathematics - Proof, Theorems.. By this time you should be definitely confident with these chapters form Maths 1 (Matrices, Pair of Lines, Conics, Vectors) and Maths 2 (Limits, Continuity, Derivatives(all), Integration(all)). If not try to complete this by december midway as these are the max imp chaps for HSC.

Biology - Increase your memorizing power by first completing Zoology(atleast 7 chaps of that) and then Botany (3 chaps).

For MHT-CET study only (1-2) hrs a day and now daily regular study is not necessary till the last date of HSC exams as from now onwards HSC studies should be given a major importance.If you devote 2hrs/week per subject for MHT-CET then it is sufficient.

From now onwards increase your time of studying to 4-6 hrs/weekdays and in 6-8 hrs/weekends. 
Also for HSC study atleast 2/3 subjects a day or else you will get bored.


All the Best