Here are some of the important points you can follow.

•     Keep in touch with every topic, Dont leave any chapter, just because you feel it wont come.
•     Devote more time on weak areas. Practice regularly to update and get hold of the concepts.
•     Do not skip topics just because it is too lengthy
•     Make short notes that include important chapters, concepts, formulae or pointers
•     Solve at least one JEE previous year question paper each day to get familiar with the paper pattern
•     Take test after every topic to strengthen your understanding of the chapter
•     Pay equal attention to all the three subjects  Physics, Chemistry, and Mathematics
•     Revise just the important or scoring topics of PCM
•     Revise all the topics weekly, and keep a tab on your learning progress
•     IIT JEE Preparation requires continuous self-evaluation, so do it.

Here are the time table you can follow

  7:30 am- Wake up and plan for the day

8:00  14:00- College hours (although you have to do both (college+jee preparation) do some JEE study even during your lectures whenever you found time for it)

2:15  3:00- Take Lunch, Rest for some time.

3:00  5:00- Study

5:00  6:00- Out of house, spend some time with friends (Play some games)

6:00  6:30- Mug Formulas and equations, Revise

6:30  8:30- Study

8:30  9:15- Dinner+ Fun+Game

9:15  11:15- Study New concepts

11:15  12:00- Buffer time for pending chapters

12:00  12:30- Plan for the next day

12:30 onwards

Sleep (Sometimes when you feel exhausted, sleep early.

Good Luck!