1. Don't read books for d sake of exam. Enjoy d phase. Tell yourself that u are reading it to gain more knowledge. That way u will start to question more& gain a better understanding. If you have a doubt, don't proceed without getting it cleared. 1+
'WHAT-WHY-WHO-HOW'
'Problems - Solutions'
'Cause - Course - Effects'
This approach will work for almost all the books you read/study for CSE. Once u find answers for these, u can very well stop there, for u would have got a better understanding with these