I will keep jugs of water in my freezer. And if we get warning of a potential hurricane I make sure to fill up every little space possible enough in advance of any possible power outage so they will freeze to help keep the contents cold. I will also fill bags with ice cubes.
Back in the "good old days" my mother would starch clothes and then hang them on clotheslines to dry. When we brought them, she would sprinkle them with water, roll them up, and stash them in the refrigerator. She said that kept them from mildewing before she could get to ironing them.