• "sigh of frustration" to make sure your desk is covered in papers, even if you are not working on any of them. Spread them out layered and use as much desk space as possible. 
• Always, Always, Always have more than one work application open.
• A recently new thing that has come out, that is perfect for disguising your lack of work.
• Always make sure when surfing the internet, you do not directly type the website address. 
• Be alert. 
• Some people try to deter detection by turning their computer screens away from any high traffic areas.  
• take a print screen of one of your applications while it is open, then copying and pasting it to another program.
• IF you are making the rounds, ensure you have a good made up lie to explain your absence. 

full story via associatedcontent