A few things that helped me moving some virtual servers from ViaVerio to Linode:

• Yum Commands
• Backup and Restore MySQL Database Using mysqldump
• Changing timezone on CentOS
• Sendmail for Virtual Servers
• Dovecot Mail Location

I do have some personal notes for things that needed to be done (partly because I was moving from FreeBSD to CentOS) but these are things I found worth bookmarking. Sendmail stuff is in there since I was migrating in a hurry, already had a Sendmail configuration from my previous server, and I couldn't seem to get Postfix to work right (I'm sure it was me and not Postfix but I just didn't have the time and patience to troubleshoot when I already had a working config.)