Can I just add something that might seem obvious?
Make sure you've got all the passwords! You *might* need passwords for the application, sa, odbc links etc.
Also, try to find out what you have to do to change passwords that the application depends on, if you need to.
May the road rise up to meet you. May the wind always be at your back. May the sun shine warm upon your face,and rains fall soft upon your fields. And until we meet again, May your God hold you in the palm of His hand.