Hello!!

We all know that in 80 days we can only revise what we have already prepared. You should not panic for new topics instead you should practice hard and polish your prepared topics. Make notes for imp topics, try to give more emphasis on the subject in which you are weak. Frequently revise your course, solve previous year question paper,  this will give you confidence and will tell you where you stand. Don't  go for a lot of books in these 80 days as you can mix up with each book. Have confidence in your self , be patient and focus on the matter which you already know. From last year question papers try to look for those topics that were repeated a no. Of times. In this way you can prepare for a topic which you were leaving earlier and was important.

Good luck!