IIT JAM is one of the toughest exams conducted in India. So, prepare yourself well for the exam.
IIT JAM 2019 Exam will be in the month of February 2019. So, you have enough time for the preparation.
For IIT JAM Physics preparation, you should first learn all the formulas. Make notes of those formulas and other important stuff. This will help you in your last minute preparation.
Solve IIT JAM Previous Year Question Papers and take online mock tests. This is the best way to prepare for the exam as this will give you and idea about the pattern and difficulty level of the questions.
Refer best books and study materials for your preparation.
Study at least 6-7 hours daily.
Give your last 30-45 mins to the revision.
Best of Luck!