For the GATE preparation you must have to follow the perfect guide to crack in easy way. Otherwise you travel a lot to reach your destination. You can find multiple website as well as Text Books for GATE Preparation but perfect guidance is the most Important.
Raj Dadhania, IIT Graduate guide you in a perfect direction to reach your academic goal. His Quora Posts are clearly articulate the way to crack the GATE Examination.
His all post of Qura guide you prefectly in your preparation. In this post he explain his preparation graph for all aspirants to crack the Exam.
Here is the Post to understand : What is the Height of GATE Preparation?