I have to say, I really enjoy the physical labor.
Not often, and not for long, but standing there plugging in cables provided a great time to think. One part of your mind is muttering to itself "port 23", but the rest of it is free to think. No meetings, no interruptions, no email. Just cables, and thought.
At the end of it, I'd figured out how I want to restructure my test plan for the next major release.
If you have to be at work, and you need some time to think, go find a physical task to do. It's amazing how much you'll get done!