The quickest way to find the contact GUID from CRM 2011 is to use the form or record page and follow the steps below:

• Navigate to the account or contact form
• Press F11, this will maximise the screen and show the url bar at the top, which will look something like
  • http://yourCRMdomain/Demo/main.aspx?etc=1&extraqs=%3f_gridType%3d1%26etc%3d1%26id%3d%257b92EB0D0E-B22E-E011-9645-00155D106B02%257d%26rskey%3d246505345&pagetype=entityrecord
• The guid is found after ID and up to the %26, which in this example is
  • id%3d%257b92EB0D0E-B22E-E011-9645-00155D106B02%257d%26
• The b%3d%257b is the opening curly bracket { and the %257d%26 is the closing curly bracket }, take those out and you are left with the guid
• 92EB0D0E-B22E-E011-9645-00155D106B02