Successful data migrations

I have seen a few issues of late with some data conversions so I thought this article that appeared in AIM's Management Today June 2008 edition would be timely reading for everyone. The article is called "Moving Critical Data" and it outlines 4 golden rules of successful migrations:

#1 - Data migration is a business issue
#2 - The business knows best
#3 - No one needs perfect data
#4 - If you can't count it, it doesn't count.