Going to the interior shop...advice?

[rockdogz]

Well if all goes right I will be taking the car to the interior shop tomorrow to have the upholstery, headliner, door panels, carpet, etc etc done.
Any advice or 'gotchas' to worry about? I know now about what NOT to put on the car when it goes to the body shop, for example - ANYTHING NEW!
Can't really avoid that this time though, as they need to see how everything fits together. Anything to share from your experience?

Thanks,