Crawl space access: Find out where the opening is located, sometimes it can be hard to find. Make sure it is easily accessible at the time of the inspection.
Attic access: Find out where the hatch is located, in the attached garage, in a bedroom, etc. Make sure it is accessible at the time of the inspection. If a shelf, or similar obstacle, is built under it and an inspector cannot access it, then that obstacle should be removed prior to the inspection.
Electric panels: Find the locations of all electric panels, including sub-panels in garages or basements. Sometimes they are hidden behind pictures or cabinets are built over them. Make sure the panels can be safely accessed from the front, so the inspector can remove the covers at the time of the inspection.
Water heater: Find out where it is located. Sometimes they are in tiny spaces behind refrigerators, in attics, etc. Make sure the tank is accessible on the day of the inspection.
Furnaces: Find out where it is located, and make sure it is accessible from the front so the inspector can remove the access doors and view components in the housing.
Sinks: If cupboards or vanities, under sinks in bathrooms and kitchens, are reasonably clear of supplies and belongings, the inspector can view these areas without having to move around personal items.
Gas, electric and water: If the buyer expects a full inspection of gas or electric appliances and the plumbing system, the gas, electricity and water must be functional.