Measure Results, Not Hours, to Improve Work Efficiency - NYTimes.com
the army was often like this. Breaking away from this mentality is very freeing.
IT’S 5 p.m. at the office. Working fast, you’ve finished your tasks for the day and want to go home. But none of your colleagues have left yet, so you stay another hour or two, surfing the Web and reading your e-mails again, so you don’t come off as a slacker.
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HackerNews thread on this subject: http://news.ycombinator.com/item?id=4622192