At Productivity 501, A Time Expert’s Perspective discusses an interview with John Robinson in the Mar/Apr issue of the Futurist magazine. He makes the point that the current level of multi-tasking that now takes place makes it more difficult to chart time use.
Another article about multi-tasking in this New York Times article describes findings from several research reports, some recently published and others not yet published. Ironically, while technology contributes to information overload, it also provides tools to handle it when used wisely. Learn to manage the tools rather than letting them manage you.