The daily routine will differ from person to person based on how fast you can learn and grasp the concepts. It would be good to revise the topics taught in class and practice questions based on the topics taught on daily basis. You do not want to have a lot of things piled up. Study and practise questions consistently. It is also recommended to manage time to revise the older concepts.
Since IIT is an exam which takes place in day time so it is advisable to everyone to shift his/her study routine from night to day at least two weeks before the final day. This will make you equally active in day as you are during night / morning and on the final day it will be easier for you to concentrate as it will be more like a daily routine. This is particularly beneficial to the students who are used to study during day time.
Start of the day. It’s really very hard to get out of bed in morning especially for studying. So, how to switch on your day? If you simply rely on the alarm of your clock, you might cheat yourself. You must have some external factor to help like you may ask your mother to awake you. Afterwards eat some very light stuff (usually dry fruits) and then sit to study for next two hours. Since during this time period your mind works quite well, it’s advisable to read theory or any tough topic. Take a break from the study for a formal breakfast. After breakfast sit and solve questions. At the noon take a break for bath and there after revise formulae / some important concepts from own notes. Then take lunch and afterwards a peaceful nap. Again wake up after 1 hour and get back to work for at-least 2-3 hours. Then at take an one and half hour break in which you can do some sort of physical exercise (like playing, exercise or just going out for a walk) then rest time for relaxing (or getting a second shower in summers). Then go back to study table and be there for 2-3 hours. Then do dinner and watch news. Then study for 2-3 hours again. Then spend 5-10 minutes to decide what subjects/topics to read next day and then go to bed.
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Remind yourself every morning why you want to do this. Then wake up and freshen yourself up.
Study new chapters/concepts in the morning.
Practice practical questions in the afternoon.
Revise what you studied the day before.
Take as long breaks and pauses as you want. But remember 2 things: Concentrate when you study, even if it is for an hour. And do something productive or refreshing in your breaks instead of sticking to facebook and other social media.
Continuous practice, revision, perseverance and relaxation is key to cracking any exam.