Hi there. 

Keep solving questions until your concept becomes crystal clear and you develop a problem-solving approach. Just for the sake of your question, it is advisable to do 250+ different types of questions from each chapter. Cracking the NEET examination comes at the cost of hard work, patience, determination, continued practice, and a lot of focus on proper time management.

The following books might prove helpful in your preparation. 

First of all, for all subjects i.e Physics, Chemistry, Biology study the NCERT books cover to cover at least twice. For Biology read NCERT as many times as possible. For only the text material of Biology, you actually don't need to refer to any other book. NCERT is more than enough for biology. You might doubt this but trust me NCERT is really really enough for Biology. I can't stress more on this FACT.

For Physics, after completing NCERT complete all examples and questions from DC Pandey Objective book of physics by Arihant publishers. Revise the material as much as possible.

For Chemistry, after completing NCERT, for physical chemistry do MCQ type questions from Vibrant Academy's book of Narendra Awasthi. It is a book for JEE but for AIIMS you only need to do and complete the TYPE 1 questions from that book and that will be enough. You will find direct questions in NEET from this book.

For inorganic chemistry, NCERT is enough. Read it as many times as possible. The same studying principle of Biology applies to Inorganic Chemistry as well.

For organic chemistry, solve Vibrant Academy's book by MS Chouhan. This book is specifically for NEET/AIIMS and will be enough to score high in the organic chemistry section.

For Biology, along with NCERT solve all questions from the book of MTG NCERT at your fingertips. Solve this book and revise it as many times as possible. 

LASTLY, your preparation would be incomplete if you don't solve previous years questions. For that refer to MTG chapter wise previous year question for all subjects i.e. Physics, Chemistry, and Biology.

Good luck!

Hello My name is AYUSH KUSHWAH, I am an IITian and I have been making my students prepare for  JEE for the last 3 years, being a teacher I would like to give you some advice that will be helpful for you in JEE preparation.

1. First of all, make a timetable and manage your time accordingly. While making the timetable, remember that time has been given for each chapter, and then make your entire routine accordingly.

2. First of all, make small goals like how much time you have to give on a  topic or how much time you have to cover an entire chapter, then concentrate completely on doing it and you can do this according to the subject.

3. The most important thing for the JEE exam is the right guidance which is very difficult to get, so as you know you do not have much time for JEE exam, then I would say from my experience that you can go towards online learning.

4  PRACTICE IS KEY OF SUCCESS Take care of your practice, just solving the doubt will not work, you will have to practice it also.

5  Now if you go towards online learning then you will have to choose the right platform which is quite difficult because there are countless platforms in the market but if you ask me for my opinion then I will suggest ARIVIHAN APPLICATION which is my 5 One experience of the year brought me the best.

You will get all the necessary things for a JEE  student in it and here is the only platform which provides so many facilities at the best price in the market, from what to do according to the timetable to practice in ARIVIHAN You will get all the facilities.

You can try this app once.

Here are some preparation tips for GATE preparation you can prefer.

Understand syllabus properly: You must be aware about the GATE syllabus, released by the organizing IIT. You must go through the section-wise and topic-wise syllabus of your chosen branch in order to know what all you have to study and what to avoid.

Solve previous year papers: Solving previous years papers is of utmost importance if you want to excel in the exam.

Weightage of Topics: it is advisable and important to study the complete GATE Syllabus, however, you can do a small exercise to gauge which sections, topics are much more important in terms of weightage given in GATE.

Resources other than books: It is good to look up topper and expert tips in this regard as they do mention the books or material they have referred to. Many GATE toppers run their own Facebook pages or blogs where they dispense advice and tips to wannabe GATE aspirants.

Remember the following points:

 Divide the Topics broadly into Strong, Weak and to be read properly.

Next schedule your preparation such that you revise the easy ones along with the tough ones and the “never read before” ones. This will ensure you have a clear view of what is to be studied and how you are going to do it.

While many advise to check the weightage and study accordingly, it is really not the correct way to go.

Check the weightage by all means and understand the important topics but don’t neglect to study.

Make Short Notes while you study as this is will be helpful during revision.

Write down Formulae that you find difficult to remember so that they are handy for revision.

Keep the solved problems separately indexed so that you can refresh and revise later when required

You can also refer the below given link for the Exam preparation.

https://engineering.careers360.com/articles/how-to-prepare-for-gate

Good Luck!