I have heard from a couple of people who found the "Ask Your Prospective Web Host the Right Questions" very helpful and they learned some things they were not aware of.
I thought I would highlight another helpful article in this great source in hopes that a few people will read it since it is also very helpful.
As I previously said, just about everything you could ever want to know about web hosting is covered in great detail in this source and it does a very good job.
Switching hosts can be a very big pain. There is so much that needs to be considered in order to do it right. This is a link to an article from this source which does a fantastic job of covering everything in "Web Hosting - Points to Remember When Switching Web Hosts." Just scroll down the page a little to see the article.
Here is the link
Web Hosting - Points to Remember When Switching Web Hosts - Web Hosting Articles - Articles Directory - Submit Your Article - Qwesz.com Article Directory