Make an effort to be there while your inspection is being done. It is not always possible and not a prerequisite, but most folks find it very helpful. If you are present, your inspector can point out to you the things you will see later in his written report. This will allow you to ask questions and will give you a better understanding of the written report.
Many people think an inspector can simply go out anytime to inspect a house, but there are some limitations. Good visibility is very important. Arrange for your inspection during daylight hours, never at night.
Be sure all of the utilities are turned on and all pilot lights are lit, if any. If the gas, water, or electricity is not turned on for the inspection, the inspector cannot completely inspect those things that use the utility. Your inspector cannot turn utilities on for the inspection.
If the house is occupied, but the occupant will not be there, be sure that all locks are removed or left open. Locked access panels to electric service boxes or attic doors, etc., prevent a complete inspection.
Furnishings and stored items can prevent an inspector from gaining access to many things that he would normally inspect. Your inspector will not move items to complete an inspection. If the current owner is preparing to move and has boxes stacked in front of the water heater, the water heater will not get a complete inspection. Be sure ready access is available.
Pets can be a problem if they are not properly secured. Even friendly dogs and cats can get in the way and distract an inspector. It is best to have them secured out of the way.