Besides the obvious needs such as, purging water systems with anti-freeze and cleaning out the fridge etc., for me, the most important item on the list is a high capacity dehumidifier. Here in the NW, we get more than our share of wet weather and as a result, humidity. I have a hose going from the dehumidifier to a 5 gallon bucket. Also, we have 2 fans running continuously, one in the front and one in the back.
At times, I have dumped as much as 1 gallon or more, everyday. We also open up all the cupboards and wardrobes.
Question...if we're not pulling all that water out of the air, where is it going? Hmmm.