There are various important tips I have mentioned below which will be useful and fruitful for you while preparation of JEE Mains:

1. First of all the most important thing is to remain positive and do not get negative by the comments of society members.
2. Do practice as much as you can previous year examination papers and sample papers with a time limit setting.
3. In the last months of joint entrance examination means don't go to new topics for study but revised the the already study chapters with more practice sets.
4. Rely on right sources and books for studying and self analyse your self by taking mock test regularly.

Read more about JEE Mains preparation:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/hi/articles/how-prepare-for-jee-main&ved=2ahUKEwjDntah2qP2AhWZTGwGHbdJCb0Qu7wFegQICBAF&usg=AOvVaw0othvB0HoLUuOzlrGngcrJ