Time

On 2007 April 1, Sunday, many people received cruel reminders of involuntary dependencies. Many tools began to perform incorrectly for the second time in three weeks from a changed daylight saving time schedule.

The US Naval Observatory advises:

A successful business depends on effective communication, but that efficacy is often difficult in accomplishment.

In my own situation, I spend too many hours juggling modest work efforts and ad-hoc communication. A basic mail server with fifty users should be a 2-hours task; with phone calls and visitors and general chit-chat, that two-hours task can extend through an entire day or more. There is more time used in restarting progress on a task; time in unrelated communication will impact schedules and can result in less production.