Foremost thing is to prepare right from the day you want to plan for it.
Beginning is half success. If you wait for some good day to start, that good day will never come and eventually you will loose/waste your time gratuitously.its not too late. Candidate must collect GATE 2013 syllabus copy and find the subjects asked during examination and segregate the subjects based on past questions and mark weightage of each subjects. GATE paper consists of that questions that are connected to specialization in M. Tech and M.E. therefore, when you start your preparation, just focus on concept not on theory derivation. Have preceding year questions papers handy to know which type of questions can be asked in the exam and contemplate on the topics that you skipped or you do not know in syllabus during your graduation.Do not revise the topics that you already know as this will waste your time. Make a separate note of equations with 2 marks and grasp it along with its concepts.