Hi dear
Some tips are:

• Follow classes regularly.Maintain class notes
• Limit your resources.Dont read too many books for a single topic .You may get confused
• For minor exams,study carefully.Dont take minors lightly
• For mid and end term exams, make a study plan at least one week before.Try to get previous years question paper
• Try to be in the top 10-20% students
• Use online resources.. YouTube/NPTEL
• Labs carry less credits but they too are important if you want to score good .

Last but not the least, hardwork is the key to success

Best of Luck!!

Hello student if you spend 3-4hrs.daily on study then it's not that difficult to score 9cgpa if you study regularly it's Not that difficult if you study regularly and do your assignments and lab on your own. But again depends on what college you are in. All you need to consentrate in your class and focus what teachers teach you in class. Just don't delay things on tomorrow do it on time. Maintain a proper routine and that's enough to score more than 9cgpa.

Feel free to comment if you have any doubt
Good luck