Antifreeze in the drains
An air compressor can make quick work of pushing all the water out of the pipes - then you don't even need to think about it until you want to. I've winterized more than a few houses and they've gone through -40*F winters with no problems the following spring.
A 2 bathroom house can be done within a few hours if you're going slow. If it's on a well and has a water hydrant by the well (or at least between the well head and the house) then the job is easier.
Don't forget to protect your appliances like dishwashers, clothes washers, and ice makers... and your water heater too.
PM me if you want more detail.
I know I'm feeling badly when I have no interest in speeding