Social is neat, Social is cool, Social is shiny, and it isn’t worth a darn unless it solves a business problem.
There are some organizations that install SharePoint Social features or Yammer because it’s the hip new thing. No training, no leadership buy-in, no business problem to solve. These implementations will be ignored by your co-workers, scorned by legal and lamented by HR.
If you want to prevent a “Social Debacle” within your organization put your ear to the ground. Listen for groups complaining about how hard it is to track things in email, find the most recent discussion on a document or project, and spending too much time in meetings discussing the same things over and over and over again.
Now you’ve found your business problem.
Talk to the group find out what they are doing and what they have tried to get the problem under control. Work with the group to create a place where these discussions can occur and be found later for review. Get the leader of the group or their boss involved early and make sure they participate in discussions and interactions.
If leadership isn’t using your Social Solution, no one will.
Make sure your Social Solution meets your users where they live; in email, on their mobile devices or in another location or piece of hardware. The business problem and how people will interact with your Social Solution is more important than the tool you choose.