An Australian study has shown that short periods using the Internet at work actually increases productivity – Study Author Brent Coker, Department of Management and Marketing, University of Melbourne. Apparently Workplace Internet Leisure Browsing – or as Brent calls it WILB – gives you a break from concentrating on work, you return refreshed and so concentration is sharpened overall. He studied 300 people who browsed for products, played games, kept up with the News and even watched YouTube videos. I’m not sure what effect YouTube videos had on others in the office. But this applied to those whose Internet breaks made up less than 20% of their time . Those who were obsessed with the Internet were less productive. So where does that leave those of us who love to Twitter?