Here is a tip that we used during a recent move of ASHA’s web site to a new hosting provider: a week or so before the switch, set the time-to-live for your domain name record to a very short interval. This will ensure that domain name servers around the web will be constantly updating your domain record so that when you map the domain to a new IP address (almost always required when moving your production servers to a new hosting provider) the change will quickly propagate across the Internet. If you don’t do this, some of your site visitors may have to wait several days for the change to make it out to their corner of the Net.