One minor correction only: for lucky #13, “wait until Googlebot and traffic begin to visit the new host before taking down the old one,” yes. And, a moment later on the same subject, “check analytics… when just about all the traffic is going to the new server you can turn off the old one.” (Paraphrasing a bit here but you know….)
In other words, 1) move the site’s doc’s to the new server (assumedly available via IP, or similar domain). 2) move the domain. 3) wait a day for the new IP to propagate through name servers 4) check stat’s on old server and new to ensure 3. 5) take down the old site. Really if the duplicate sites are both up for only a day or two, there will be no dup content spam penalty… may even want to check webmaster account for google bot index frequency and make the move right in between it’s schedule.