You certainly should regularly replace smoke detector batteries, but be sure to check the detectors again before an inspection. Also, replace any bathroom and , kitchen and outdoor outlets with ground fault current interruptor (GFCI) outlets if you haven't already done so. These safety receptacles are typically required for any outlet near water.

Getting into the mind of the inspector before his examination will pay off with a cleaner report and a potentially higher resale value.

Source: http://www.networx.com/article/what-to-expect-from-an-inspector0