First of all, it depends on which department you are pursuing your M.Tech. Secondly, if you want to do your P.hD abroad, then, according to me, you should focus more and more on internships and projects.
I am not talking about the projects just to a subject level, I am talking about the projects on the university level. You can also contact some of the companies for internships or small projects going on. Because in technical field, extra-curricular activities are nonetheless not important.
So, in my opinion, go for internships and projects and maintain good relations with your professors (recommendations).
I hope this might work as some help for you.
Ankush Jindal, studied at Indian Institutes of Technology
Source: Quora Digest