The key is to get things to the point that you never go to your IT closet - ever. IT departments should not be seen or heard from (reference a BBC program on netflix - The IT Crowd).
At one time when I had lots of IT clients, I would schedule quarterly meetings with them for regular Q & A just to get some face time. If I didn't they would go endless months without ever seeing me and then question why they should pay my bill.
JamesNT