As the syllabus of Jee is based on NCERT and your boards (CBSE) as well. Considering all your basics are clear and you only need guidance for revision so for that you are halfway there and  for rest you can complete important topics in first two days and rest three days you can keep for your mock papers. Try to give more number of mocks and check test analysis report properly and do not make silly mistake. Be confident and do not cram.

You can also go through below article for the same -

http://www.engineering.careers360.com/articles/7-tips-crack-jee

Good Luck!!!