What to do in vacations?

I have completed my first year of engineering (Electrical and Electronics branch). And now I have vacations of about 2 months. I don't want to waste this time and I have to do something in electronics. I am really confused what to do. I have some basic knowledge about electronics. I have worked on arduino and AVR. I don't know much about SPICE (just some basics). Should I work on development board or just read books on electronics or attend some course like circuit designing etc etc. I really want advice from you experienced guys. Please help.
Thank you.

If I were you I would try to get some work experience in a local electronics company.

Should I work on development board or just read books on electronics or attend some course
Nothing beats actually doing it. And few university courses are very good at teaching the practical aspects.