One stressful thing after Hurricane Charley was not having much practice living without power. We had all the basic supplies needed, but had not tried things out to see how everything would actually work.
There were a number of things that all needed to be done while the generator was running, so we had to do a lot of trial and error for a few days to make it work out. Our cell phones needed to be charged, as well as any rechargeable batteries and rechargeable equipment (flashlights, hand-held vacuums, drills, laptops, etc). During the few hours each day the generator was on we needed to replenish all our water supplies for drinking, cooking, cleaning, and animals. That was the time to do a load of laundry or take a real shower, and run the air conditioner to cut humidity.
If we would have done some practice runs periodically, things would have been less stressful. Imagine the massive messes we had on our hands from the storm, horrible mosquitoes, medical issues with some of the animals caused by the standing water and dampness, no answering machine, no air conditioning, and no electricity. In a disaster these kinds of difficulties are unavoidable, so it makes sense to minimize the unnecessary stresses ahead of time. Having some kind of schedule for fun practice drills with the whole family is a wise idea.