[Christian]

GTD is from a time when not everybody had a smartphone in his pocket. Today you have your phone, your computer, your Internet and many of your documents with you all the time. That in turn means that the contexts related to those Re no longer bound to your office. I still have an office context which is mainly used for things like checking the physical mail or looking up a file that is located in the office.

I do have a "phone", an "internet" and a "write" context. All those apply to my iPhone, iPad and MacBook which means I will check the for availible actions when on the road or waiting anywhere, able to do some calls. A perspective that sums up all the tasks under these three contexts, maybe called "smartphone" is one thing you could do to get a better overview.