Working on my iPad: Where do you do work when you need to Focus.

I have learned over the years that I am not an Home-Office/Office kind of person. It is becasue of this that when I need to Focus there are two things I do. First is to grab my iPad. Second is to leave my Home-Office.
Some critics said that you can’t work on the iPad because doesn’t multitask, that it is exactly one of my favorite reasons to use it when I want to single task (or do focused work).
Having one application on the screeen force me to stay focused for a longer time, that at the same time help me to stay focused for longer time and finished the task in hand faster.
Where do you go/do when you need to focus?