How do you account for your databases?  Do you track them in a database?  If so, what information do you track?

I have a spreadsheet that hopefully I do not forget to update when I add a new database to a server so I know who to notify in case there are issues.  When I took over this position there was very little information for most of the databases in my charge.  I thought to myself ‘shouldn’t you know what each database is for and why it is on your server?  How did it get there?  Is anyone still using it?’  As database administrators I believe we should know our data.

I am interested to hear how others handle this and if you even care?  Please send me your input.  Enjoy!