mainly focus on core subjects . as u are ece 2nd year it was the right time ,  those are electonic devices and circuits,network analysis,emtl,...etc

You should learn basics of your core subjects perfectly to keep your self strong in academics and at the same time Prticipate in all tech fests and do extra curricular activities to make your CV Strong.......and go through the site  www.btechguru.com  to improve your communication skills

To prepare your resume, first take help from professionals or seniors .You have an option to learn resume building skills in www.btechguru.com/courses.

Go through that link you can subscirbe to resumne Building Tips

you mainly foucs on ur branch related subjrcet s then u get good knowledge about ur branch.......