The stress many people feel can be directly attributed to the avoidance of daily and weekly catching up—with the flood of emails, voice mails, meetings, projects, and other informational and actionable items.
What bugs me the most is that most people behave as if this stuff is relatively unimportant, and frankly a pain to have to deal with. I argue that it's where much of their primary value lies. Knowledge workers are paid to bring their intelligence to bear on input, and improve things by doing that. The decision about what to do with an email and its contents, what it means in terms of the work and standards at hand, is knowledge work.
We've noticed that it takes an average of about 30 seconds to process each email—decide what it is, delete it, file it, respond to it quickly, or defer it to an "action" file or list. For someone with 100 emails a day (more and more common) that's 50 minutes just to get through a day's email load. That doesn't count memos, phone calls, voice mails, conversations, and meetings that must also be processed.
A typical professional these days must factor in at least an hour a day and an additional hour at the end of the week (for a Weekly Review). And not as "Hey, it would be nice if I could..."—but as an absolute requirement to manage their life and work with integrity.
I empathize that processing input these days is a particular challenge for most people. They have lacked a consistent processing methodology, a sustainable system that would work with this kind of volume and speed, and a reference point that there actually is a way to deal with it all, and get a clear head in the process.
Well, no more excuses.