You can follow below strategies

1- Know about the GATE Examination

2-Know the Syllabus & Weightage of  each subject

3-Select Good Books & Materials for GATE preparation.

4-Solve previous year papers.

5-Make your own time-table.

6-Do your revision properly

7-Practice Mock Test

Good Luck!!

This is very good to know that you are serious about this, but I would suggest you to start your Gate preparation from 3rd year itself as that is the ideal time. So better to focus on your B.Tech syllabus as this is the time to clear all your basic concepts.

Hope this helps!!!