‘Project plans’ as utilized in a business function, are used as a communications tool and a form of checklist of tasks. Keeping that in mind, the best place to start with creating your plan is to start with the high level deliverables of your project, and then break each of those deliverables down into the tasks that it will take to get them completed. I tend to treat this part of my project plan as my ‘brain dump’. I put in the high-level deliverables, then ask ‘then what?’
Since Project Managers play the role of planning, organizing, and managing resources – all social tasks – they should be embracing, using, and benefiting from using Social Tools to manage their projects.