Check out these stats on time usage from Key Organization Systems:
"Most people actually use 60% or less of available work time. When more than 38,000 people in 200 countries were queried about individual productivity, it showed that even though they were physically at work five days a week, they were only productively using three days.
Microsoft Survey, March 15, 2005
"Using time-diary studies, it is found that people claiming to work 60 to 69 hours per week clocked an average of 52.6 hours, while those who believed they worked 70-, 80-hour or greater weeks totalled 58.8 hours."
Prof. Robinson, 2006-2007 comparisons, American Time Use Survey, Bureau of Labor Statistics
"43% of Americans categorize themselves as disorganized, and 21% have missed vital work deadlines. Nearly half say disorganization causes them to work late at least 2 or times each week."
Jane Von Bergen, "So many reasons to neaten up...", Boston Globe 3/12/2006, Esselte survey, David Lewis
"Employees spend an average of 36 minutes per day at work on personal tasks. By gender, men take 44 minutes and women 29 minutes, with the 18-34 year old group using the most time."
Office Team surveys, February 2007