I actually take a break on purpose sometimes. It is so I can have some creative time. I spend a certain amount of time making things, thinking of new ideas for videos and articles. I normally write the idea down on paper so when I return to the computer, I do research and start writing the hub again.
Since I am fairly new, I don't stay gone for long. Maybe a day or two. As I move towards my own blogs, I will take longer breaks away from Hubpages. I am in the "builder" mode right now. Getting myself and hubs to the point that I am making money each month. I am sure I will want a longer break after that is met. This takes a lot of drive, ambition, focus and time. Everyone needs a break from all that thinking and working at times!