Productivity?

Using my time wisely at work, I pondered what I really should be doing. There are a lot of things I would like to do, such as sleeping or running or shopping, but should I really be doing them? The obvious answer would be "No." But if the answer is "No" and I have nothing else that I should be doing, then what? I think I have hit the bottom the the bordem barrel. I am trying to find more and more to take on at work, but nothing is coming to mind. But what really sucks about working in such a large company is you have to wait sometimes (ok, most of the time) to finish your work because your work is contingent upon someone else's work and they might not get it to you until they feel like it, which to you in unacceptable.

Perhaps I should take up a new hobby on researching an interesting topic and somehow find a way to relate it back to work.
Or perhaps my manager should give me more like I ask.
Or perhaps I should just keep looking for more on my own...
Or perhaps I should walk around the office and quote lines from "Office Space."