In a recent survey we did of new users, one of the top requests for more "How To" content. We created a section dedicated to this content on CheckMates!
If you're going to do this with migrate export/import, make sure you're using the right version of the tools to both export and import!
Upgrading software on an existing cluster is one thing, but upgrading the hardware your existing cluster is using is a different story. Some hints and tips in this thread.
Even though SKs state this tool isn't supported, it still seems to work, particularly if you bring the appliance into maintenance mode first.
This thread shows you the differences. Also: Content Awareness is free, whereas DLP is not.