A checklist would be a good idea. If we're talking about potable water systems, another way to handle this is by draining the piping, appliances, etc. and then using compressed air to blow out any remaining water. Things like the water tanks and water heater don't have to be empty, just nearly empty.
Winterizing this way eliminates the cost of antifreeze but more importantly, there's no taste of the antifreeze to get rid of next season.