Now, the workday is ripe for another disruption. Research suggests that in an eight-hour day, the average worker is only productive for 2 hours and 53 minutes.
[...]
The most popular unproductive activities listed were:
   Reading news websites--1 hour, 5 minutes
   Checking social media--44 minutes
   Discussing non-work-related things with co-workers--40 minutes
   Searching for new jobs--26 minutes
   Taking smoke breaks--23 minutes
   Making calls to partners or friends--18 minutes
   Making hot drinks--17 minutes
   Texting or instant messaging--14 minutes
   Eating snacks--8 minutes
   Making food in office--7 minutes
Source de l'étude : The study, conducted by www.vouchercloud.com, polled 1,989 UK office workers all aged over 18 as part of research into the online habits and productivity of workers across the nation. All respondents currently worked full-time in an office role.