Prior to your inspection, make sure that the following items are operable:
Utilities – Water, Electricity, and Gas should all be on at the time of inspection.
Doors – All exterior and interior doors should be unlocked and accessible.
Attic – Remove any stored items which could restrict or hinder access to the attic.
Gas Appliances – Be sure all heating systems and water heaters are operational. Pilot lights should always be lit. If pilot lights are not lit and/or valves are off, the inspector will be unable to properly inspect the operation of the appliances they serve.
These preparations will make the process easier for the inspector and less time consuming and disruptive for you.