hi,

see first of all you need to have clear concept and your basics knowledge should be good of mathematics, physics and chemistry. some of the books which is really important for preparation is ncert books, physics by hc verma, arihant Jermain mcq, tata macgraw jee main mcq. every day revise all 3 subjects and practice mcqs.

you may also use careers360 jee main knockout program to boost up your preparation .

https://learn.careers360.com/knockout-jee-main-april/