Well if u have scored 300 it means u know the basics…u just need some time management..and some more push and revision!!
Well it is not at all impossible!!!
Just fix your routine!! Like..at least..12–13 hrs/day minm you have to give this much time as it is not easy to complete the whole vast syllabus multiple times in just few months!!so u have to give time to your studies!!
Just start your everyday fresh!!You can start your day with a chp of biology…give 2&1/2 hrs to it..not more to single or..if chp is small then..2 chp of bio daily…
Just make your daily target to complete single chp of all three sub daily..it would really help u just write the chp name and start from the easiest chp you will soon get habituated to it!!
If you are unable to complete phy daily then give it two days but try to understand the concept and as u r studying for the first time the chps..make a formula diary write the formulas there and revise it daily..Write the formulas or things which u usually forget…
Just divide the diary in two halves 1 for physics and sec for chem..write the ncert named reaction in that,formulas of physical, reactions of organic, exception of inorganic and just revise the diary for 1/2 hr both sub (jitna ho ske, it’s not necessary ki pooora diary complete kro it’s not possible in half hr)…