More and more people’s jobs are made up of dozens or even hundreds of e-mails a day

“What you’ve probably discovered, at least at some level, is that a calendar, though important, can really effectively manage only a small portion of what you need to organize. And daily to-do lists and simplified priority coding have proven inadequate to deal with the volume and variable nature of the average professional’s workload. More and more people’s jobs are made up of dozens or even hundreds of e-mails a day, with no latitude left to ignore a single request, complaint, or order. There are a few people who can (or even should) expect to code everything an “A,” a “B,” or a “C” priority, or who can maintain some predetermined list of to-dos that the first telephone call or interruption from their boss won’t totally undo.”

—David Allen, Getting Things Done: The Art of Stress-Free Productivity, p. 8