Arrrgh, I've Deleted my Default Database

I have a local instance of SQL server 2005 on my desktop which hosts a number of databases that I have worked on over the years.  I decided I would have a bit of a clean up and deleted a number of the databases.  Unfortunately, I hadn't updated my main login and deleted the default database.  In SQL server this means that when a login has no default database the login will not be given access to the server object so I could no longer login. 

I couldn't remember my sa password so it was off to google to see what I could do.  Fortunately I found a command to open SSMS using a different DB (master). 

sqlwb -S <login name> -d master -E

Once into SSMS I could then alter the default database of the login to master.

EXEC sp_defaultdb <login name>, 'master'

This altered the login default database and I checked by running

SELECT * FROM master.dbo.syslogins

There it was, default db changed.  Whilst I was there I updated a number of logins that had deleted databases as their master and everything was hunky dory.  I also changed the sa password to something I would remember so that I didn't caught out again.