One thing I'd mention that came up with a friend yesterday. Be sure that your help desk, sys admins, etc. know where the VM exists on a physical host. Someone had a situation with a reboot where the VM didn't start, and help desk people didn't know where to look for the VM.

documentation matters here. I built an app for someone years ago to track physical servers, including location since there were over 1000 in the data center. Had to add a section to note VMs so personel could find them.