As per your concern I will help you here to tell you some tips to prepare for IIT JAM exam so that you can have idea.

Here I’m telling you some tips
Start preparing well in advance

Getting admitted into JAM coaching institutes

Prepare notes for important topics

Always go through the syllabus of exam

Try to past question papers as much as you can

Try too take mock exam as much as you can

Take reference books to prepare for the exam

Prepare cheats for important notes and paste them where you can see easily to remember

Revise your topics in 2-3 week

Take proper sleep 6-7 hourse

Here is the syllabus IIT JAM Which also help you in exam

IIT JAM Syllabus