....saw this on another website...

Plan your testing by securing test hardware for the server(s) and for the client(s).  Document the steps you plan to follow during the test upgrade so you have a checklist for production upgrade day (Upgrade Checklist).  Create checklists for testing so that you are confident that mission critical functionality is being tested (Testing Checklist).  If users can’t take the time to create a testing checklist (or to validate the checklist that you create), then they should be prepared for the consequences of finding a bug or regression after production rollout.  Don’t forget to include customizations or integrations with other systems in your test environment.

Anyone have a sample checklist they have created, or an example....??