Waste of time

Often times we hear people say, "you're wasting your time". Please, Define waste of time.

Is watching movie a waste of time? How about playing games? Oh, facebook, is it? Or maybe blogging, twitting?

Personally, I define "waste of time" as not balance.

- Balance -
Striking a balance between work, and "Rest and Relax". Anything that makes you unbalance, is called waste of time. Overloading yourself with work, is a waste of time. Spending a whole day playing game, neglecting your work, time with your family, is waste of time. Spending a couple of hours on it, and its called taking a break from your life...

Same goes for reading: Some considers reading not a waste of time. I've seen a bunch of people read the book entire day, doing nothing else. Thus, do you think that "Addicted reading Harry Potter" not a waste of time? I don't think so.