I struggle with the same thing - I have never been able to stay busy at a job. I think one point of context is what the job expects (supervisors, etc.). One is if you are hourly or salary. I think if you are hourly and completely bored you, unfortunately, either need to find something to do or go home because you are costing your company money. If you are salary, then there is more an expectation of you being hired to a do a job, and if the job is done…well…it’s not as bad…
On the other hand, feelings of guilt show us (and me especially) that something is not right…you don’t feel right doing nothing at work. I agree that something can always be done and you can talk to the boss.
But I’m still interested to know, until then, what do you do? I have a desk job. I’m relatively new, and so they still haven’t pushed everything to me that they should. I am INCREDIBLY bored most day! (and have been all my life, because one problem is that I just work faster than most peopl). They took the internet away from us as a company, so I couldn’t goof off even if I wanted to. I tried to pray the rosary during lent (knowing, of course, that if I was interrupted I was to work!). But, seriously, I spend most of my time spacing out at my desk because there’s nothing to do.
I hate the idea that a situation like that is somehow cheating my boss when I’m the one feeling neglected by the people who hired me. Not a big motivator to work hard, and I also bounce between choices A and B.