Here are some preparation tips for GATE you can prefer given below:

Check the Full Mechanical Engineering Syllabus: You are advised to check the official syllabus for Mechanical Engineering (ME) of GATE 2018. All of the important topics should be referred to and studied.

Early Preparation: Starting the preparation process of GATE 2018 is a better choice for all candidates. The more time available for revision later on, the more chances will be there you will be more well versed with the topics and sections of the syllabus.

Solve Mock Test and Sample Papers: You should try to solve sample papers and mock test as much you can. By using these test and papers, you will be able to practically apply everything that you have studied.

Create a Formula Book: You should make your note book to write down the formulaes.This will be also very useful for your revision.

You can also check Mechanical Engineering GATE Syllabus with given below link.

GATE Syllabus ME

Good Luck!